NOTES TO INTERIM CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

1. DESCRIPTION OF BUSINESS

Impax Laboratories, Inc. (“Impax” or the “Company”) is a specialty pharmaceutical company that focuses on developing, manufacturing, marketing and distributing generic and branded pharmaceutical products. The Company has two reportable segments, referred to as “Impax Generics” and “Impax Specialty Pharma.” The Impax Generics division focuses on a broad range of therapeutic areas, including products having technically challenging drug-delivery mechanisms or unique product formulations. In addition to developing solid oral dosage products, the Impax Generics division’s portfolio includes alternative dosage form products, primarily through alliance and collaboration agreements with third parties. The Company’s Impax Specialty Pharma division is focused on the development and promotion, through the Company’s specialty sales force, of proprietary branded pharmaceutical products for the treatment of central nervous system (“CNS”) disorders and other select specialty segments.

Operating and Reporting Structure

The Company currently operates in two divisions: the Impax Generics division and the Impax Specialty Pharma division. The Impax Generics division includes the Company’s legacy Global Pharmaceuticals business as well as the acquired businesses of CorePharma, LLC ("CorePharma") and Lineage Therapeutics, Inc. ("Lineage") from the Company's acquisition of Tower Holdings, Inc. ("Tower") and its subsidiaries on March 9, 2015 (the "Tower Acquisition"). The Impax Specialty Pharma division includes the legacy Impax Pharmaceuticals business as well as the acquired business of Amedra Pharmaceuticals, LLC ("Amedra") from the Tower Acquisition.

Impax Generics develops, manufactures, sells, and distributes generic pharmaceutical products primarily through the following four sales channels: the “Impax Generics” sales channel, for generic pharmaceutical prescription products the Company sells directly to wholesalers, large retail drug chains, and others; the “Private Label” sales channel, for generic pharmaceutical over-the-counter (“OTC”) and prescription products the Company sells to unrelated third-party customers who, in turn, sell the product to third parties under their own label; the “Rx Partner” sales channel, for generic prescription products sold through unrelated third-party pharmaceutical entities under their own label pursuant to alliance agreements; and the “OTC Partner” sales channel, for generic pharmaceutical OTC products sold through unrelated third-party pharmaceutical entities under their own labels pursuant to alliance and supply agreements. Revenues from the “Impax Generics” sales channel and the “Private Label” sales channel are reported under the caption “Impax Generics sales, net” in “Note 22. Supplementary Financial Information.” Revenues from the “OTC Partner” sales channel are reported under the caption “Other Revenues” in “Note 22. Supplementary Financial Information.”

Impax Specialty Pharma is engaged in the development, sale and distribution of proprietary brand pharmaceutical products that the Company believes represent improvements to already-approved pharmaceutical products addressing CNS disorders and other select specialty segments. Impax Specialty Pharma currently has one internally developed branded pharmaceutical product, Rytary® (IPX066), an extended release oral capsule formulation of carbidopa-levodopa for the treatment of Parkinson’s disease, post-encephalitic parkinsonism, and parkinsonism that may follow carbon monoxide intoxication and/or manganese intoxication, which was approved by the FDA on January 7, 2015 and which the Company began marketing in the United States in April 2015. The Company received marketing authorization from the European Commission for Numient® (the brand name of IPX066 outside of the United States) during the fourth quarter of fiscal year 2015. In addition to Rytary®, Impax Specialty Pharma is also currently engaged in the sale and distribution of four other branded products; the more significant include Zomig® (zolmitriptan) products, indicated for the treatment of migraine headaches, under the terms of a Distribution, License, Development and Supply Agreement with AstraZeneca UK Limited (“AstraZeneca”) in the United States and in certain U.S. territories (the "AZ Agreement"), and Emverm® (mebendazole) 100 mg chewable tablets, indicated for the treatment of pinworm, whipworm, common roundworm, common hookworm, and American hookworm in single or mixed infections. Revenues from Impax-labeled branded products are reported under the caption “Impax Specialty Pharma sales, net” in “Note 22. Supplementary Financial Information.” Impax Specialty Pharma also has a number of product candidates that are in varying stages of development. See “Note 21. Segment Information,” for financial information about our segments for the three months ended March 31, 2017 and 2016 .

Operating Locations

    

The Company owns and/or leases facilities in California, Pennsylvania, New Jersey and Taiwan, Republic of China (“R.O.C.”). In California, the Company utilizes a combination of owned and leased facilities mainly located in Hayward. The Company’s primary properties in California consist of a leased office building used as the Company’s corporate headquarters, in addition to five properties it owns, including a research and development center facility and a manufacturing facility. Additionally, the Company leases two facilities in Hayward, utilized for additional research and development, equipment storage and quality assurance support. In Pennsylvania, the Company leases office space for sales and marketing, finance, and administrative personnel in Fort Washington. In New Jersey, the Company leases manufacturing, packaging, research and development and warehousing facilities in Middlesex and office space in Bridgewater. Outside the United States, in Taiwan, R.O.C., the Company owns a manufacturing facility.

Management Changes

On March 27, 2017, the Company announced that its Board of Directors had appointed Paul M. Bisaro as President and Chief Executive Officer and as a director of the Company, effective as of March 27, 2017. Mr. Bisaro succeeded J. Kevin Buchi, a member of the Company's Board of Directors, who served as the Company's Interim President and Chief Executive Officer since December 19, 2016 following G. Frederick Wilkinson's separation from the Company as described below. Mr. Buchi currently remains a member of the Company's Board of Directors. In connection with his appointment as President and Chief Executive Officer, Mr. Bisaro and the Company entered into an Employment Agreement dated March 24, 2017 (the “Employment Agreement”). The initial term of the Employment Agreement expires on March 27, 2019, unless further extended or earlier terminated, and automatically renews for single one -year periods unless either party provides a written notice of non-renewal at least 90 days prior to the end of the applicable term or unless it is terminated earlier.

On December 20, 2016, the Company announced that G. Frederick Wilkinson and the Company had mutually agreed that Mr. Wilkinson would separate from his positions as President and Chief Executive Officer and resign as a member of its Board of Directors, effective December 19, 2016. In connection with his separation from the Company, Mr. Wilkinson and the Company entered into a General Release and Waiver dated as of December 19, 2016 (the “General Release and Waiver”). Pursuant to the General Release and Waiver, the Company provided Mr. Wilkinson with certain termination benefits and payments. The Company recorded $5.4 million in costs associated with Mr. Wilkinson’s separation in the year ended December 31, 2016, comprised of $4.9 million of separation pay and benefits and $0.5 million of expense related to the accelerated vesting of certain of Mr. Wilkinson’s outstanding stock options and restricted stock awards pursuant to the terms of the General Release and Waiver.

2. BUSINESS ACQUISITION

Teva Transaction

On August 3, 2016, the Company completed its previously announced acquisition of (A) certain assets related to (i) 15 then currently marketed generic pharmaceutical products, (ii) one then approved generic product and two then tentatively approved strengths of a then currently marketed product, which at the time of the closing had not yet launched, (iii) one pipeline generic product and one pipeline strength of a then currently marketed product, which at the time of the closing were pending approval by the FDA and (iv) one generic product then under development, and (B) the return to the Company of its full commercial rights to its pending ANDA for the generic equivalent to Concerta® (methylphenidate hydrochloride), a product the Company previously partnered with Teva Pharmaceuticals USA, Inc. (“Teva USA”) (collectively, the products and pipeline products and the assets related thereto in (A) and (B), the “Acquired Product Lines” and the transactions related thereto the “Teva Transaction”), pursuant to (x) an Asset Purchase Agreement, dated as of June 20, 2016, as amended on June 30, 2016, with Teva Pharmaceutical Industries Ltd. (“Teva”), acting directly or through its affiliates (the “Teva APA”), (y) an Asset Purchase Agreement, dated as of June 20, 2016, as amended on June 30, 2016, with affiliates of Allergan plc (“Allergan”), (the “Allergan APA” and collectively with the Teva APA, the "APAs"), and (z) a Termination Agreement, dated as of June 20, 2016, between the Company and Teva USA, terminating each party’s rights and obligations with respect to methylphenidate hydrochloride under the Strategic Alliance Agreement, dated June 27, 2001, as amended between the Company and Teva USA. The aggregate purchase price for the Acquired Product Lines pursuant to the terms of the Teva APA and the Allergan APA, including the upfront payment to Teva in accordance with the Termination Agreement, was $585.8 million in cash at closing. The Company is also obligated to make future payments to Teva of up to $40.0 million under the terms of the Termination Agreement, payable upon the achievement of specified commercialization events related to methylphenidate hydrochloride. The Teva Transaction was part of the divestiture process mandated by the Federal Trade Commission in connection with the acquisition by Teva of the U.S. generics business of Allergan.

The Company financed the Teva Transaction utilizing cash on hand and $400.0 million , the full amount of borrowing available, from its Term Loan Facility with Royal Bank of Canada, as discussed in "Note 12. Debt." To date, the Company has incurred total acquisition-related costs of $3.8 million for the Teva Transaction, largely during the second and third quarters of 2016, and of which minimal amounts were incurred during the three months ended March 31, 2017 and 2016 .

The acquisition of the foregoing currently marketed and pipeline products fits with the Company’s strategic priorities of maximizing its Generics Division’s platform and optimizing research and development opportunities. Through the Teva Transaction, the Company expects to expand its portfolio of difficult-to-manufacture or limited-competition products and maximize utilization of its existing manufacturing facilities in Hayward, California and Taiwan.

As part of the closing of the Teva Transaction, the Company, Teva and Allergan agreed to certain transition related services pursuant to which the Company agreed to manage the payment process for certain commercial chargebacks and rebates on behalf of Teva and Allergan related to products each of Teva and Allergan sold into the channel prior to the closing date. On August 18, 2016, the Company received a payment totaling $42.4 million from Teva and Allergan, which represented their combined estimate of the amount of commercial chargebacks and rebates to be paid by the Company on their behalf to wholesalers who purchased products from Teva and Allergan prior to the closing. Pursuant to the agreed upon transition services, Teva and Allergan are obligated to reimburse the Company for additional payments related to chargebacks and rebates made on their behalf in excess of the $42.4 million . If the total payments made by the Company on behalf of Teva and Allergan are less than $42.4 million , the Company is obligated to refund the difference to Teva and/or Allergan. As of March 31, 2017 , the Company had paid $29.1 million on behalf of Teva and Allergan related to chargebacks and rebates as described above and $13.3 million remained in accrued expenses on the consolidated balance sheet.

Purchase Accounting and Consideration

Financial Accounting Standards Board ("FASB") Accounting Standards Codification ("ASC") Topic 805, Business Combinations ("ASC 805") defines a business as consisting of inputs and processes applied to those inputs that have the ability to create outputs. The Company has determined that the Acquired Product Lines meet the definition of a business and, accordingly, has accounted for the Teva Transaction as a business combination under the acquisition method of accounting.

    

The following is an estimate of the purchase price for the Teva Transaction as of the closing date of August 3, 2016 (in thousands):

(1) The contingent consideration arrangement pursuant to the Termination Agreement potentially requires the Company to pay up to $40.0 million of additional consideration to Teva upon the achievement of specified commercialization events related to methylphenidate hydrochloride. The $30.1 million fair value of the potential contingent consideration payments recognized on the acquisition date was estimated by applying a probability-weighted expected return methodology.

Recognition and Measurement of Assets Acquired at Fair Value

The Company has allocated the purchase price for the Teva Transaction based upon the estimated fair value of the assets acquired at the date of acquisition.

    

The following is an estimate of the fair value of the intangible and tangible assets acquired in connection with the Teva Transaction on the closing date of August 3, 2016 (in thousands):

(1) "IPR&D" refers to the Company's in-process research and development product rights. Pursuant to the Termination Agreement, Teva returned to the Company its full commercial rights to its pending ANDA for the generic equivalent to Concerta ^® (methylphenidate hydrochloride), a product the Company previously partnered with Teva USA under a Strategic Alliance Agreement dated June 27, 2001, as amended. As a result, the Company recognized an intangible asset of $78.9 million related to the reacquired IPR&D. The Company engaged a third-party valuation specialist to measure the value of the reacquired product right using a discounted cash flow analysis. The asset was determined to be indefinite-lived based on the market participant methodology prescribed in ASC 805.

The estimated fair value of the in-process research and development and identifiable intangible assets was determined using the “income approach,” which is a valuation technique that provides an estimate of the fair value of an asset based on market participant expectations of the cash flows an asset would generate over its remaining useful life. The assumptions, including the expected projected cash flows, utilized in the purchase price allocation and in determining the purchase price were based on management's best estimates as of the closing date of the Teva Transaction on August 3, 2016. Some of the more significant assumptions inherent in the development of those asset valuations include the estimated net cash flows for each year for each asset or product (including net revenues, cost of sales, research and development costs, selling and marketing costs and working capital / contributory asset charges), the appropriate discount rate to select in order to measure the risk inherent in each future cash flow stream, the assessment of each asset’s life cycle, the potential regulatory and commercial success risks, competitive trends impacting the asset and each cash flow stream, as well as other factors. The discount rate used to arrive at the present value at the closing date of the intangible assets was 6.7% . No assurances can be given that the underlying assumptions used to prepare the discounted cash flow analysis will not change. For these and other reasons, actual results may vary significantly from estimated results. During the third and fourth quarters of 2016, the Company recognized impairment charges totaling $308.4 million related to the intangible assets from the Teva Transaction. During the first quarter of 2017, the Company recognized impairment charges of $41.8 million related to the intangible assets from the Teva Transaction as described in "Note 10. Intangible Assets and Goodwill" below.

Unaudited Pro Forma Results of Operations

The unaudited pro forma combined results of operations for the three months ended March 31, 2016 (assuming the closing of the Teva Transaction occurred on January 1, 2015) are as follows (in thousands):

The pro forma adjustments reflected herein include only those adjustments that are directly attributable to the Teva Transaction, factually supportable and expected to have a continuing impact on the Company. The pro forma results have been prepared for comparative purposes only and are not necessarily indicative of the actual results of operations had the closing of the Teva Transaction taken place on January 1, 2015. Furthermore, the pro forma results do not purport to project the future results of operations of the Company.

The unaudited pro forma information reflects primarily the following adjustments:

• Adjustments to amortization expense related to identifiable intangible assets acquired;

• Adjustments to interest expense to reflect the Company's Term Loan Facility (described in “Note 12. Debt”); and

All of the items above were adjusted for the applicable tax impact.

3. BASIS OF PRESENTATION

Interim Financial Statements

The accompanying unaudited interim consolidated financial statements have been prepared from the books and records of the Company in accordance with accounting principles generally accepted in the United States ("U.S. GAAP") for interim financial information and Rule 10-01 of Regulation S-X promulgated by the United States Securities and Exchange Commission (“SEC”), which permit reduced disclosures for interim periods. All adjustments necessary for a fair presentation of the accompanying balance sheets and statements of operations, comprehensive loss, and cash flows have been made. Although these interim consolidated financial statements do not include all of the information and footnotes required for complete annual financial statements, management believes the disclosures are adequate to make the information presented not misleading. Unaudited interim results of operations and cash flows are not necessarily indicative of the results that may be expected for the full year. Unaudited interim consolidated financial statements and footnotes should be read in conjunction with the audited consolidated financial statements and footnotes included in the Company's Annual Report on Form 10-K for the year ended December 31, 2016 , as filed with the SEC, wherein a more complete discussion of significant accounting policies and certain other information can be found.

Principles of Consolidation

The Company's unaudited interim consolidated financial statements include the accounts of the operating parent company, Impax Laboratories, Inc., its wholly owned subsidiaries, including Impax Laboratories USA, LLC, Impax Laboratories (Taiwan), Inc., ThoRx Laboratories, Inc., Impax International Holdings, Inc., Impax Holdings, LLC, Impax Laboratories (Netherlands) C.V., Impax Laboratories (Netherlands) B.V., Impax Laboratories Ireland Limited, Lineage and Tower, including operating subsidiaries CorePharma, Amedra Pharmaceuticals, Mountain LLC and Trail Services, Inc., in addition to an equity investment in Prohealth Biotech (Taiwan), Inc. (“Prohealth”), in which the Company held a 57.54% majority ownership interest at March 31, 2017 . All significant intercompany accounts and transactions have been eliminated.

Foreign Currency Translation

The Company translates the assets and liabilities of the Taiwan dollar functional currency of its majority-owned affiliate Prohealth and its wholly-owned subsidiary Impax Laboratories (Taiwan), Inc. into the U.S. dollar reporting currency using exchange rates in effect at the end of each reporting period. The revenues and expenses of these entities are translated using an average of the rates in effect during the reporting period. Gains and losses from these translations are recorded as currency translation adjustments included in the consolidated statements of comprehensive loss.

Use of Estimates

The preparation of financial statements in conformity with accounting principles generally accepted in the United States ("U.S. GAAP") and the rules and regulations of the U.S. Securities & Exchange Commission ("SEC") requires the use of estimates and assumptions, based on complex judgments considered reasonable, which affect the reported amounts of assets and liabilities and disclosure of contingent assets and contingent liabilities at the date of the consolidated financial statements and the reported amounts of revenues and expenses during the reporting period. The most significant judgments are employed in estimates used in determining values of tangible and intangible assets, contingent consideration, legal contingencies, tax assets and tax liabilities, fair value of share-based compensation related to equity incentive awards issued to employees and directors, and estimates used in applying the Company’s revenue recognition policy, including those related to accrued chargebacks, rebates, product returns, Medicare, Medicaid, and other government rebate programs, shelf-stock adjustments, and the timing and amount of deferred and recognized revenue and deferred and amortized product manufacturing costs related to alliance and collaboration agreements. Actual results may differ from estimated results.

Reclassifications

Certain prior period amounts have been reclassified to conform to the current period presentation.

4. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

The Company's complete Summary of Significant Accounting Policies can be found in "Item 15. Exhibits and Financial Statement Schedules - Note 4. Summary of Significant Accounting Policies" in the Company's Annual Report on Form 10-K for the year ended December 31, 2016 , as filed with the SEC. Certain significant accounting policies have been repeated below.

Revenue Recognition

The Company recognizes revenue when the earnings process is complete, which under SEC Staff Accounting Bulletin No. 104, Topic No. 13, “Revenue Recognition” (“SAB 104”), is when revenue is realized or realizable and earned, there is persuasive evidence a revenue arrangement exists, delivery of goods or services has occurred, the sales price is fixed or determinable, and collectability is reasonably assured.

The Company accounts for material revenue arrangements which contain multiple deliverables in accordance with Financial Accounting Standards Board ("FASB") Accounting Standards Codification ("ASC") Topic 605-25, Revenue Recognition - Multiple-Element Arrangements ("ASC 605-25"), which addresses the determination of whether an arrangement involving multiple deliverables contains more than one unit of accounting. A delivered item within an arrangement is considered a separate unit of accounting only if both of the following criteria are met:

Under ASC 605-25, if both of the criteria above are not met, then separate accounting for the individual deliverables is not appropriate. Revenue recognition for arrangements with multiple deliverables constituting a single unit of accounting is recognized generally over the greater of the term of the arrangement or the expected period of performance, either on a straight-line basis or on a modified proportional performance method.

The Company accounts for milestones related to research and development activities in accordance with FASB ASC Topic 605-28, Revenue Recognition - Milestone Method ("ASC 605-28"). ASC Topic 605-28 allows for the recognition of consideration, which is contingent on the achievement of a substantive milestone, in its entirety in the period the milestone is achieved. A milestone is considered to be substantive if all of the following criteria are met:

Impax Generics revenues, net and Impax Specialty Pharma revenues, net

The Impax Generics revenues, net and Impax Specialty Pharma revenues, net include revenue recognized related to shipments of generic and branded pharmaceutical products to the Company’s customers, primarily drug wholesalers and retail chains. Gross sales revenue is recognized at the time title and risk of loss passes to the customer, which is generally when product is received by the customer. Net revenues may include deductions from the gross sales price related to estimates for chargebacks, rebates and administrative fees, distribution service fees, returns, shelf-stock adjustments, and other pricing adjustments. The Company records an estimate for these deductions in the same period when revenue is recognized. A description of each of these gross-to-net deductions follows.

The Company has agreements establishing contract prices for certain products with certain indirect customers, such as retail pharmacy chains, group purchasing organizations, managed care organizations, hospitals and government agencies who purchase products from drug wholesalers. The contract prices are lower than the prices the customer would otherwise pay to the wholesaler, and the price difference is referred to as a chargeback, which generally takes the form of a credit memo issued by the Company to reduce the invoiced gross selling price charged to the wholesaler. An estimated accrued provision for chargeback deductions is recognized at the time of product shipment. The primary factors considered when estimating the provision for chargebacks are the average historical chargeback credits given, the mix of products shipped, and the amount of inventory on hand at the major drug wholesalers with whom the Company does business. The Company also monitors actual chargebacks granted and compares them to the estimated provision for chargebacks to assess the reasonableness of the chargeback reserve at each quarterly balance sheet date.

The Company maintains various rebate and administrative fee programs with its customers in an effort to maintain a competitive position in the marketplace and to promote sales and customer loyalty. The rebates generally take the form of a credit memo to reduce the invoiced gross selling price charged to a customer for products shipped. An estimated accrued provision for rebate deductions is recognized at the time of product shipment. The primary factors the Company considers when estimating the provision for rebates are the average historical experience of aggregate credits issued, the mix of products shipped and the historical relationship of rebates as a percentage of total gross product sales, the contract terms and conditions of the various rebate programs in effect at the time of shipment, and the amount of inventory on hand at the major drug wholesalers with whom the Company does business. The Company also monitors actual rebates granted and compares them to the estimated provision for rebates to assess the reasonableness of the rebate reserve at each quarterly balance sheet date.

The Company pays distribution service fees to several of its wholesaler customers related to sales of its Impax Products. The wholesalers are generally obligated to provide the Company with periodic outbound sales information as well as inventory levels of the Company’s Impax Products held in their warehouses. Additionally, the wholesalers have agreed to manage the variability of their purchases and inventory levels within specified days on hand limits. An accrued provision for distribution service fees is recognized at the time products are shipped to wholesalers.

The Company allows its customers to return product if approved by authorized personnel in writing or by telephone with the lot number and expiration date accompanying any request and if such products are returned within six months prior to or until twelve months following, the product’s expiration date. The Company estimates and recognizes an accrued provision for product returns as a percentage of gross sales based upon historical experience. The product return reserve is estimated using a historical lag period, which is the time between when the product is sold and when it is ultimately returned, and estimated return rates which may be adjusted based on various assumptions including: changes to internal policies and procedures, business practices, commercial terms with customers, and the competitive position of each product; the amount of inventory in the wholesale and retail supply chain; the introduction of new products; and changes in market sales information. The Company also considers other factors, including significant market changes which may impact future expected returns and actual product returns. The Company monitors actual returns on a quarterly basis and may record specific provisions for returns it believes are not covered by historical percentages.

Based upon competitive market conditions, the Company may reduce the selling price of certain Impax Generics division products. The Company may issue a credit against the sales amount to a customer based upon their remaining inventory of the product in question, provided the customer agrees to continue to make future purchases of product from the Company. This type of customer credit is referred to as a shelf-stock adjustment, which is the difference between the initial sales price and the revised lower sales price, multiplied by an estimate of the number of product units on hand at a given date. Decreases in selling prices are discretionary decisions made by the Company in response to market conditions, including estimated launch dates of competing products and declines in market price. The Company records an estimate for shelf-stock adjustments in the period it agrees to grant such a credit memo to a customer.

The Company offers cash discounts to its customers, generally 2% to 3% of the gross selling price, as an incentive for paying within invoice terms, which generally range from 30 to 90 days. An estimate of cash discounts is recorded in the same period when revenue is recognized.

As required by law, the Company provides a rebate on drugs dispensed under the Medicaid program, Medicare Part D, TRICARE, and other U.S. government pricing programs. The Company determines its estimated government rebate accrual primarily based on historical experience of claims submitted by the various states and other jurisdictions and any new information regarding changes in the various programs which may impact the Company’s estimate of government rebates. In determining the appropriate accrual amount, the Company considers historical payment rates and processing lag for outstanding claims and payments. The Company records estimates for government rebates as a deduction from gross sales, with a corresponding adjustment to accrued liabilities.

The Rx Partner and OTC Partner contracts include revenue recognized under alliance and collaboration agreements between the Company and unrelated third-party pharmaceutical companies. The Company has entered into these alliance agreements to develop marketing and/or distribution relationships with its partners to fully leverage its technology platform.

The Rx Partners and OTC Partners alliance agreements obligate the Company to deliver multiple goods and/or services over extended periods. Such deliverables include manufactured pharmaceutical products, exclusive and semi-exclusive marketing rights, distribution licenses, and research and development services. In exchange for these deliverables the Company receives payments from its agreement partners for product shipments and research and development services, and may also receive other payments including royalties, profit sharing payments, and upfront and periodic milestone payments. Revenue received from the alliance agreement partners for product shipments under these agreements is not subject to deductions for chargebacks, rebates, product returns, and other pricing adjustments. Royalty and profit sharing amounts the Company receives under these agreements are calculated by the respective agreement partner, with such royalty and profit share amounts generally based upon estimates of net product sales or gross profit which include estimates of deductions for chargebacks, rebates, product returns, and other adjustments the alliance agreement partners may negotiate with their respective customers. The Company records the agreement partner's adjustments to such estimated amounts in the period the agreement partner reports the amounts to the Company.

The Company applies the updated guidance of ASC 605-25 to the Strategic Alliance Agreement, as amended, with Teva Pharmaceuticals USA, Inc., an affiliate of Teva Pharmaceutical Industries Limited (the “Teva Agreement”). The Company looks to the underlying delivery of goods and/or services which give rise to the payment of consideration under the Teva Agreement to determine the appropriate revenue recognition. The Company initially defers consideration received as a result of research and development-related activities performed under the Teva Agreement. The Company recognizes deferred revenue on a straight-line basis over the expected period of performance for such services. Consideration received as a result of the manufacture and delivery of products under the Teva Agreement is recognized at the time title and risk of loss passes to the customer, which is generally when product is received by Teva. The Company recognizes profit share revenue in the period earned.

OTC Partner revenue is related to agreements with Pfizer, Inc., formerly Wyeth LLC (“Pfizer”) and L. Perrigo Company (“Perrigo”) with respect to the supply of the Company's over-the-counter pharmaceutical product Loratadine and Pseudoephedrine Sulfate 5 mg/129 mg 12-hour Extended Release Tablets (the "D12 Product"). The OTC Partner sales channel is no longer a core area of the business, and the over-the-counter pharmaceutical products the Company sells through this sales channel are older products which are now only sold to Pfizer and Perrigo. The Company is currently only required to manufacture the over-the-counter pharmaceutical products under its agreements with Pfizer and Perrigo. The Company recognizes profit share revenue in the period earned. During the quarter ended September 30, 2016, the Company sold the ANDAs for both the D12 Product and the Loratadine and Pseudoephedrine Sulfate 10 mg/240 mg 24-hour Extended Release Tablets, in addition to other specified assets, to Perrigo pursuant to an asset purchase agreement with Perrigo dated as of March 31, 2016 (the "Perrigo APA"). Under the terms of the Perrigo APA, the Company will also continue to supply the D-12 Product to Pfizer and Perrigo until the date that is the earliest of (i) the date Perrigo’s manufacturing facility is approved to manufacture the D-12 Product and (ii) December 31, 2017 (the "Supply End Date"). On the Supply End Date, the Company will assign and transfer its supply agreement with Pfizer in its entirety to Perrigo in accordance with the Perrigo APA.

The Research Partner contract revenue results from development agreements the Company enters into with unrelated third-party pharmaceutical companies. The development agreements generally obligate the Company to provide research and development services over multiple periods. In exchange for this service, the Company generally receives upfront payments upon signing of each development agreement and is eligible to receive contingent milestone payments, payment of which is based upon the achievement of contractually specified events. Additionally, the Company may also receive royalty payments from the sale, if any, of a successfully developed and commercialized product under one of these development agreements. The Company recognizes revenue received from the achievement of contingent research and development milestones in the period such payment is earned. Royalty revenue, if any, will be recognized as current period revenue when earned.

5. RECENT ACCOUNTING PRONOUNCEMENTS  

In May 2014, the FASB issued Accounting Standards Update ("ASU") 2014-09, “ Revenue from Contracts with Customers ” (Topic 606), regarding the accounting for and disclosures of revenue recognition, with an effective date for annual and interim periods beginning after December 15, 2016. This update provides a single comprehensive model for accounting for revenue from contracts with customers. The model requires that revenue recognized reflect the actual consideration to which the entity expects to be entitled in exchange for the goods or services defined in the contract, including in situations with multiple performance obligations. In July 2015, the FASB issued ASU 2015-14, “ Revenue from Contracts with Customers (Topic 606): Deferral of the Effective Date ,” which deferred the effective date of the previously issued revenue recognition guidance by one year. The guidance will be effective for annual and interim periods beginning after December 15, 2017. In April 2016 and May 2016, the FASB issued ASU 2016-10, " Revenue from Contracts with Customers (Topic 606): Identifying Performance Obligations and Licensing " and ASU 2016-12, " Revenue from Contracts with Customers (Topic 606): Narrow-Scope Improvements and Practical Expedients ," respectively. Both of these updates provide improvements and clarification to the previously issued revenue recognition guidance. The new standard can be adopted using one of two methods: the full retrospective method, which requires the standard to be applied to each prior period presented, or the modified retrospective method, which requires the cumulative effect of adoption to be recognized as an adjustment to opening retained earnings in the period of adoption. The Company currently expects to adopt the new revenue recognition standard in 2018 using the modified retrospective method. The Company is currently evaluating the impact that adoption will have on its consolidated financial statements. The majority of the Company's revenue relates to the sale of finished products to various customers, and though the Company is still evaluating the impact of this standard, management does not currently believe that the adoption will have a material impact on these transactions. The Company is continuing to evaluate the impact on certain less significant transactions involving third-party collaborations and other arrangements.

In July 2015, the FASB issued ASU 2015-11, Inventory (Topic 330): “ Simplifying the Measurement of Inventory ,” with guidance regarding the accounting for and measurement of inventory. The update requires that inventory measured using first-in, first-out ("FIFO") shall be measured at the lower of cost and net realizable value. When there is evidence that the net realizable value of inventory is lower than its cost, the difference shall be recognized as a loss in earnings in the period in which it occurs. The guidance is effective for annual and interim periods beginning after December 15, 2016. The Company adopted this guidance during the first quarter of 2017, and it did not have a material effect on the Company's consolidated financial statements.

    

In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842), with guidance regarding the accounting for and disclosure of leases. The update requires lessees to recognize all leases, including operating leases, with a term greater than 12 months on the balance sheet. This update also requires lessees and lessors to disclose key information about their leasing transactions. The guidance will be effective for annual and interim periods beginning after December 15, 2018. The Company is currently evaluating the effect that this guidance will have on its consolidated financial statements and related disclosures. The Company expects the implementation of this standard to have an impact on its consolidated financial statements and related disclosures as its aggregate future minimum lease payments were $30.2 million as of December 31, 2016 under its current portfolio of non-cancelable leases for land, office space, and manufacturing, warehouse and research and development facilities with various expiration dates between April 2017 and December 2027. The Company anticipates recognition of additional assets and corresponding liabilities related to these leases on its consolidated balance sheet.

In March 2016, the FASB issued ASU 2016-06, Derivatives and Hedging (Topic 815): " Contingent Put and Call Options in Debt Instruments ," with guidance regarding the accounting for embedded derivatives related to debt contracts. The update clarifies that determining whether the economic characteristics of a put or call are clearly and closely related to its debt host requires only an assessment of the four-step decision sequence outlined in FASB ASC paragraph 815-15-25-24. The update also indicates that entities are not required to separately assess whether the contingency itself is clearly and closely related. The guidance is effective for annual and interim periods beginning after December 15, 2016. The Company adopted this guidance during the first quarter of 2017, and it did not have an effect on the Company's consolidated financial statements.

In March 2016, the FASB issued ASU 2016-09, Compensation - Stock Compensation (Topic 718): " Improvements to Employee Share-Based Payment Accounting ," with guidance regarding the simplification of accounting for share-based payment award transactions. The update changes the accounting for such areas as the accounting and cash flow classification for excess tax benefits and deficiencies; forfeitures; and tax withholding requirements and cash flow classification. The guidance is effective for annual and interim periods beginning after December 15, 2016. The Company adopted the new guidance effective January 1, 2017 and elected to eliminate the use of a forfeiture rate estimate in the determination of share-based compensation expense for restricted stock awards using the modified retrospective transition method, which resulted in a $1.4 million charge to opening retained earnings for 2017. In addition, the Company is now presenting the cash paid for tax withholdings on stock options exercised and restricted stock awards vested retrospectively in cash flows from financing activities as opposed to the historical presentation in cash flows from operating activities. Excess tax benefits or deficiencies, historically recorded to additional paid-in capital, are recorded to income tax expense as they occur on a prospective basis.

In August 2016, the FASB issued ASU 2016-15, Statement of Cash Flows (Topic 230): " Classification of Certain Cash Receipts and Cash Payments, " with guidance intended to reduce the diversity in practice regarding how certain cash receipts and cash payments are presented and classified within the statement of cash flows. The update addresses eight specific cash flow issues including debt prepayment or debt extinguishment costs, the settlement of zero-coupon debt instruments or other debt instruments with coupon interest rates that are insignificant in relation to the effective interest rate of the borrowing, contingent consideration payments made after a business combination, proceeds from the settlement of insurance claims, proceeds from the settlement of corporate-owned life insurance policies (COLIs) (including bank-owned life insurance policies (BOLIs)), distributions received from equity method investees, beneficial interests in securitization transactions, and separately identifiable cash flows and application of the predominance principle. The guidance will be effective for annual and interim periods beginning after December 15, 2017. The Company is currently evaluating the effect that this guidance may have on its consolidated financial statements.

In October 2016, the FASB issued ASU-2016-16, Income Taxes (Topic 740): " Intra-Entity Transfers of Assets Other Than Inventory, " with guidance intended to more faithfully represent the economics of intra-entity asset transfers. The update clarifies that entities must recognize the income tax consequences of intra-entity asset transfers, other than inventory, when the transfer occurs. The guidance will be effective for annual and interim periods beginning after December 15, 2017. The Company is currently evaluating the effect that this guidance may have on its consolidated financial statements.

In January 2017, the FASB issued ASU-2017-01, Business Combinations (Topic 805): " Clarifying the Definition of a Business, " with guidance intended to assist entities in evaluating whether transactions should be accounted for as acquisitions (or disposals) of businesses. The update provides a screen to determine whether an integrated set of assets and activities constitute a business. If the screen is not met, it (1) requires that to be considered a business, a set must include, at a minimum, an input and a substantive process that together significantly contribute to the ability to create output and (2) removes the evaluation of whether a market participant could replace the missing elements. The guidance will be effective for annual and interim periods beginning after December 15, 2017 and should be applied prospectively. The Company is currently evaluating the effect that this guidance may have on its consolidated financial statements.

In January 2017, the FASB issued ASU 2017-03, Accounting Changes and Error Corrections (Topic 250) and Investments - Equity Method and Joint Ventures (Topic 323), which add to and amend SEC paragraphs pursuant to the SEC Staff Announcements at the September 22, 2016 and November 17, 2016 Emerging Issues Task Force (EITF) meetings. The guidance provides additional disclosure requirements regarding the impact of recently issued accounting standards on the financial statements of a registrant when such standards are adopted in a future period. The Company adopted this guidance during the first quarter of 2017, and it did not have an effect on the Company’s consolidated financial statements.

In January 2017, the FASB issued ASU-2017-04, Intangibles - Goodwill and Other (Topic 350): " Simplifying the Test for Goodwill Impairment, " which removes the second step of the two-step goodwill impairment test. In order to reduce the cost and complexity of testing goodwill for impairment, entities are now only required to perform a one-step quantitative impairment test and to record the amount of goodwill impairment as the excess of a reporting unit's carrying amount over its fair value, not to exceed the total amount of goodwill allocated to the reporting unit. The new guidance does not amend the optional qualitative assessment of a reporting unit to determine if the quantitative impairment test is necessary. Entities should apply the guidance on a prospective basis and disclose the nature of and reason for the change in accounting principle upon transition. The guidance will be effective for annual and interim periods beginning after December 15, 2019, with early adoption permitted for interim or annual goodwill impairment tests performed after January 1, 2017. The Company adopted this guidance as of the first quarter of 2017, and it did not have an effect on the Company’s consolidated financial statements.

In February 2017, the FASB issued ASU 2017-05, Other Income - Gains and Losses from the Derecognition of Nonfinancial Assets (Subtopic 610-20), which provides clarification regarding the scope of the asset derecognition guidance and accounting for partial sales of nonfinancial assets. The update defines an in substance nonfinancial asset and clarifies that an entity should identify each distinct nonfinancial asset or in substance nonfinancial asset promised to a counterparty and derecognize each asset when a counterparty obtains control of it. All businesses and nonprofit activities within the scope of Subtopic 610-20 are excluded from the amendments in this update. This guidance will be effective for annual and interim periods beginning after December 15, 2017 and is required to be applied at the same time as ASU 2014-09 (described above) is applied. The guidance can be applied using one of two methods: retrospectively to each prior reporting period presented or retrospectively with the cumulative effect of initially applying the guidance recognized against retained earnings as of the beginning of the fiscal year of adoption. The Company is currently evaluating the effect that this guidance may have on its consolidated financial statements.

6. FAIR VALUE MEASUREMENT AND FINANCIAL INSTRUMENTS  

The carrying values of cash equivalents, accounts receivable, prepaid expenses and other current assets, and accounts payable in the Company’s consolidated balance sheets approximated their fair values as of March 31, 2017 and December 31, 2016 due to their short-term nature.     

Certain of the Company’s financial instruments are measured at fair value using a three-level hierarchy that prioritizes the inputs used to measure fair value. This hierarchy maximizes the use of observable inputs and minimizes the use of unobservable inputs. The three levels of inputs used to measure fair value are as follows: 

The carrying amounts and fair values of the Company’s financial instruments at March 31, 2017 and December 31, 2016 are indicated below (in thousands): 

The following table presents the changes in Level 3 instruments measured on a recurring basis for the three months ended March 31, 2017 (in thousands):

7.  ACCOUNTS RECEIVABLE

The composition of accounts receivable, net is as follows (in thousands):

(1) Includes estimated $40.6 million and $40.3 million as of March 31, 2017 and December 31, 2016 , respectively, receivable due from Turing Pharmaceuticals AG ("Turing") for reimbursement of Daraprim® chargebacks and Medicaid rebate liabilities pursuant to an Asset Purchase Agreement between the Company and Turing dated August 7, 2015 (the "Turing APA"). In accordance with the terms of the Turing APA and in accordance with federal laws and regulations, the Company receives, and is initially responsible for processing and paying (subject to reimbursement by Turing), all chargebacks and rebates resulting from utilization by Medicaid, Medicare and other federal, state and local government programs, health plans and other health care providers for products sold under the Company's labeler code. Under the terms of the Turing APA, Turing is responsible for liabilities related to chargebacks and rebates that arise as a result of Turing's marketing or selling related activities in connection with Daraprim®. Refer to "Note 20. Legal and Regulatory Matters" for a description of the Company's suit against Turing related to, among other matters, Turing's failure to reimburse the Company for chargebacks and Medicaid rebate liabilities when due.

(2) As a result of the uncertainty of collection from Turing that developed during the first quarter of 2016, the Company recorded a reserve of $48.0 million as of March 31, 2016, which represented the full amount of the estimated receivable due from Turing. During the fourth quarter of 2016, the Company received a $7.7 million payment from Turing. During the first quarter of 2017, the Company increased the reserve balance by $0.3 million to reflect additional estimated Medicaid rebate claims due from Turing. As of March 31, 2017, the $40.6 million estimated receivable due from Turing was fully reserved.

A rollforward of the rebate and chargeback reserves activity for the three months ended March 31, 2017 and the year ended December 31, 2016 is as follows (in thousands):

The payment mechanisms for rebates in the Impax Generics and Impax Specialty Pharma divisions are different, which impacts the location on the Company's consolidated balance sheets. Impax Generics rebates are classified as "Accounts receivable, net" on the Company's consolidated balance sheets. Impax Specialty Pharma rebates are classified as "Accrued expenses" on the Company's consolidated balance sheets.

8.  INVENTORY

Inventory, net of carrying value reserves, as of March 31, 2017 and December 31, 2016 consisted of the following (in thousands): 

Inventory carrying value reserves were $55.6 million and $38.0 million at March 31, 2017 and December 31, 2016 , respectively.

The Company recognizes pre-launch inventories at the lower of its cost or the expected net selling price. Cost is determined using a standard cost method, which approximates actual cost, and assumes a FIFO flow of goods. Costs of unapproved products are the same as approved products and include materials, labor, quality control, and production overhead. When the Company concludes FDA approval is expected within approximately six months, the Company will generally begin to schedule manufacturing process validation studies as required by the FDA to demonstrate the production process can be scaled up to manufacture commercial batches. Consistent with industry practice, the Company may build quantities of pre-launch inventories of certain products pending required final FDA approval and/or resolution of patent infringement litigation, when, in the Company’s assessment, such action is appropriate to prepare for the anticipated commercial launch, FDA approval is expected in the near term, and/or the related litigation will be resolved in the Company’s favor. The capitalization of unapproved pre-launch inventory involves risks, including, among other items, FDA approval of product may not occur; approvals may require additional or different testing and/or specifications than used for unapproved inventory; and, in cases where the unapproved inventory is for a product subject to litigation, the litigation may not be resolved or settled in favor of the Company. If any of these risks were to materialize and the launch of the unapproved product delayed or prevented, then the net carrying value of unapproved inventory may be partially or fully reserved. Generally, the selling price of a generic pharmaceutical product is at discount from the corresponding brand product selling price. Typically, a generic drug is easily substituted for the corresponding branded product, and once a generic product is approved, the pre-launch inventory is typically sold within the subsequent three months . If the market prices become lower than the product inventory carrying costs, then the pre-launch inventory value is reduced to such lower market value. If the inventory produced exceeds the estimated market acceptance of the generic product and becomes short-dated, a carrying value reserve will be recorded. In all cases, the carrying value of the Company's pre-launch product inventory is lower than the respective estimated net selling prices. The carrying value of unapproved inventory less reserves was $47.1 million and $29.2 million at March 31, 2017 and December 31, 2016 , respectively.

To the extent inventory is not scheduled to be utilized in the manufacturing process and/or sold within twelve months of the balance sheet date, it is included as a component of other non-current assets. Amounts classified as non-current inventory consist of raw materials, net of valuation reserves. Raw materials generally have a shelf life of approximately three to five years , while finished goods generally have a shelf life of approximately two years .

9. PROPERTY, PLANT AND EQUIPMENT

Property, plant and equipment, net of accumulated depreciation, consists of the following (in thousands):

Depreciation expense was $7.8 million and $6.3 million for the three months ended March 31, 2017 and March 31, 2016 , respectively.

Unpaid vendor invoices relating to purchases of property, plant and equipment of $4.3 million and $4.5 million , which were accrued as of March 31, 2017 and March 31, 2016 , respectively, have been excluded from the purchase of property, plant, and equipment and the change in accounts payable and accrued expenses in the Company’s consolidated statements of cash flows.

10. INTANGIBLE ASSETS AND GOODWILL

Intangible Assets

The Company’s intangible assets include both finite lived and indefinite-lived assets. Finite lived intangible assets, consisting of marketed product rights and royalties received from product sales by the Company’s third party partners, are amortized over the estimated useful life of the asset based on the pattern in which the economic benefits are expected to be consumed or otherwise used up or, if that pattern is not readily determinable, on a straight-line basis. The remaining weighted-average amortization period for the Company's finite lived intangible assets not yet fully amortized is 7.4 years as of March 31, 2017 . Indefinite-lived intangible assets consist of acquired IPR&D product rights and acquired future royalty rights to be paid based on other companies’ net sales of products not yet approved. IPR&D assets acquired in a business combination are considered indefinite-lived until the completion or abandonment of the associated research and development efforts. Amortization over the estimated useful life will commence at the time of the respective product’s launch. If FDA approval to market the product is not obtained, the Company will immediately expense the related capitalized cost.

Finite lived intangible assets are tested for impairment when events or changes in circumstances indicate that the carrying value of the asset may not be recoverable. All of the Company's indefinite-lived intangible assets are tested for impairment at least annually during the fourth quarter of the fiscal year, or more often if indicators of impairment are present. Impairment testing requires management to estimate the future undiscounted cash flows of an intangible asset using assumptions believed to be reasonable, but which are unpredictable and inherently uncertain. Actual future cash flows may differ from the estimates used in the impairment testing. The Company recognizes an impairment loss when and to the extent that the estimated fair value of an intangible asset is less than its carrying value.

The following tables show the gross carrying values and accumulated amortization, where applicable, of the Company’s intangible assets by type for the Company’s consolidated balance sheets presented (in thousands):

During the first quarter of 2017, the Company recognized a total of $45.4 million of intangible asset impairment charges, of which $39.3 million was recognized in cost of revenues impairment charges and $6.1 million was recognized in in-process research and development impairment charges on the Company's consolidated statement of operations. The $45.4 million impairment charge was almost entirely attributable to three products, two of which are currently marketed products and one of which is an IPR&D product, all acquired as part of the Teva Transaction. For the currently marketed products, the impairment charge was the result of continued significant price and volume erosion during the first quarter of 2017 without an offsetting increase in customer demand, resulting in significantly lower expected future cash flows. For the IPR&D product, the impairment charge was the result of increased estimated research and development expenses and a delay in the anticipated product launch due to a change in the regulatory strategy to secure FDA approval of such product.

Also during the first quarter of 2017, the Company commercially launched a product acquired as IPR&D as part of the Teva Transaction and, as a result, transferred the $2.5 million asset value from non-amortized, indefinite-lived acquired IPR&D product rights to amortized, finite lived marketed product rights. This asset will be amortized over an estimated useful life of seven years based on the pattern of economic benefit expected to be realized through 2023.

The Company recognized amortization expense of $17.2 million and $8.8 million for the three months ended March 31, 2017 and 2016 , respectively, in cost of revenues in the consolidated statements of operations presented. Assuming no changes to the gross carrying amount of finite-lived intangible assets, amortization expense for fiscal years 2017 through 2021 is estimated to be in the range of $31.1 million to $67.5 million annually.

Goodwill

Goodwill had a carrying value on the Company's consolidated balance sheets of $207.3 million and $207.3 million at March 31, 2017 and December 31, 2016 , respectively. At March 31, 2017 , the Company attributed $147.6 million and $59.7 million to the Impax Generics division and the Impax Specialty Pharma division, respectively.

11. ACCRUED EXPENSES

The following table sets forth the Company’s accrued expenses (in thousands):  

(1) Includes estimated $3.1 million and $6.8 million as of March 31, 2017 and December 31, 2016 , respectively, of liabilities for Daraprim® chargebacks and rebates resulting from utilization by Medicaid, Medicare and other federal, state and local governmental programs, health plans and other health care providers for product sold under the Company’s labeler code, which amounts are subject to reimbursement by Turing in accordance with the terms of the Company's purchase agreement with Turing. From August 7, 2015 through March 31, 2017 , the Company has made $45.3 million of such payments on Turing's behalf.

(2) As discussed in "Note 2. Business Acquisition," pursuant to certain agreed upon transition related services by and among the Company, Teva and Allergan after the closing of the Teva Transaction, the Company agreed to manage the payment process for certain commercial chargebacks and rebates on behalf of Teva and Allergan related to products each of Teva and Allergan sold into the channel prior to the Company's acquisition of the products. On August 18, 2016, the Company received a payment totaling $42.4 million from Teva and Allergan, which represented their combined estimate of the amount of commercial chargebacks and rebates to be paid by the Company on their behalf to wholesalers who purchased products from Teva and Allergan prior to the closing. Pursuant to the agreed upon transition services, Teva and Allergan are obligated to reimburse the Company for additional payments related to chargebacks and rebates for products they sold into the channel prior to the closing and made on their behalf in excess of the $42.4 million . If the total payments made by the Company on behalf of Teva and Allergan are less than $42.4 million , the Company is obligated to refund the difference to Teva and/or Allergan. As of March 31, 2017 , the Company had paid $29.1 million related to chargebacks and rebates as described above and $13.3 million remained in accrued expenses on the Company's consolidated balance sheet.

Product Returns

The Company maintains a return policy to allow customers to return product within specified guidelines. The Company estimates a provision for product returns as a percentage of gross sales based upon historical experience for sales made through its Impax Generics and Impax Specialty Pharma sales channels. Sales of product under the Private Label, Rx Partner and OTC Partner alliance, collaboration and supply agreements are not subject to returns.

A roll-forward of the return reserve activity for the three months ended March 31, 2017 and the year ended December 31, 2016 is as follows (in thousands):

12. DEBT

Royal Bank of Canada Credit Facilities

On August 3, 2016, the Company entered into a restatement agreement with Royal Bank of Canada, as administrative agent, and the lenders and guarantors party thereto (the "Restatement Agreement"). The Restatement Agreement amends and restates the Company's existing Revolving Credit Facility Agreement (as amended and restated and amended to date, the "Amended and Restated Credit Agreement") to, among other things, (i) add a term loan feature to allow for the borrowing of up to $400.0 million of term loans (the "Term Loan Facility") by the Company in accordance with the terms of the Amended and Restated Credit Agreement, (ii) increase the aggregate principal amount of revolving loans permitted under the Amended and Restated Credit Agreement (the "Revolving Credit Facility," and, together with the Term Loan Facility, the "RBC Credit Facilities"), from $100.0 million to $200.0 million ; and (iii) extend the maturity date of the Revolving Credit Facility from August 4, 2020 to August 3, 2021. On March 27, 2017, the Company entered into Amendment No. 1 by and among the Company, Royal Bank of Canada, as administrative agent, and the lenders party thereto (the “Amendment”) to the Amended and Restated Credit Agreement.

Borrowings under the Amended and Restated Credit Agreement will accrue interest at a rate equal to LIBOR or the base rate, plus an applicable margin. The applicable margin may be increased or reduced by 0.25% based on the Company's total net leverage ratio. Up to $12.5 million of the Revolving Credit Facility is available for issuance of letters of credit and any such letters of credit will reduce the amount available under the Revolving Credit Facility on a dollar-for-dollar basis. The Company is required to pay a commitment fee to the lenders on the average daily unused portion of the Revolving Credit Facility at 0.50% or 0.375% per annum, depending on the Company's total net leverage ratio.

The Amended and Restated Credit Agreement contains certain negative covenants (subject to exceptions, materiality thresholds and other allowances) including, without limitation, negative covenants that limit the Company's and its restricted subsidiaries' ability to incur additional debt, guarantee other obligations, grant liens on assets, make loans, acquisitions or other investments, dispose of assets, make optional payments in connection with or modify certain debt instruments, pay dividends or make other payments on capital stock, engage in mergers or consolidations, enter into arrangements that restrict the Company's and its restricted subsidiaries' ability to pay dividends or grant liens, engage in transactions with affiliates, or change its fiscal year. Prior to the effective date of the Amendment on March 27, 2017, the Amended and Restated Credit Agreement also included a financial maintenance covenant whereby the Company must not permit its total net leverage ratio in any 12 -month period to exceed 5.00 :1.00, as tested at the end of each fiscal quarter. Effective as of March 27, 2017 and pursuant to the Amendment, the total net leverage ratio financial covenant was replaced with a new senior secured net leverage ratio financial covenant. Pursuant to the Amendment, the Company must not permit its senior secured net leverage ratio to exceed 2.50 :1.00 and the interest coverage ratio to be less than 3.00 :1.00, in each case in any 12 -month period, as tested at the end of each fiscal quarter. The Company was in compliance with all of its covenants under the Amended and Restated Credit Agreement as of March 31, 2017 .

The Amended and Restated Credit Agreement contains events of default, including, without limitation (subject to customary grace periods and materiality thresholds), events of default upon (i) the failure to make payments pursuant to the terms of the Amended and Restated Credit Agreement, (ii) violation of covenants, (iii) incorrectness of representations and warranties, (iv) cross-default and cross-acceleration to other material indebtedness, (v) bankruptcy events, (vi) material monetary judgments (to the extent not covered by insurance), (vii) certain matters arising under the Employee Retirement Income Security Act of 1974, as amended, that could reasonably be expected to result in a material adverse effect, (viii) the actual or asserted invalidity of the documents governing the RBC Credit Facilities, any material guarantees or the security interests (including priority thereof) required under the Amended and Restated Credit Agreement and (ix) the occurrence of a change of control (as defined therein). Upon the occurrence of certain events of default, the obligations under the Amended and Restated Credit Agreement may be accelerated and any remaining commitments thereunder may be terminated.

The full amount of proceeds from the Term Loan Facility of $400.0 million , along with $196.4 million of cash were used to finance the Teva Transaction (including transaction costs) at closing on August 3, 2016. As of March 31, 2017 , the full amount of the $200.0 million Revolving Credit Facility remains available to the Company for working capital and other general corporate purposes.

In connection with the Term Loan Facility, the Company incurred $11.0 million of debt issuance costs for banking, legal and accounting fees and other expenses during the third quarter of 2016. In connection with the Amendment, the Company incurred $0.8 million of debt issuance costs for banking fees during the first quarter of 2017. These debt issuance costs were recorded on the Company's consolidated balance sheet as a reduction to the current and long-term portions of debt related to the Term Loan Facility. These deferred debt issuance costs will be accreted to interest expense over the term of the debt using the effective interest method. In connection with the increase in the aggregate principal amount of revolving loans permitted under the Revolving Credit Facility, the Company incurred $0.8 million of debt issuance costs for banking fees which were recorded as an asset with current and long-term portions on the Company's consolidated balance sheet. These deferred debt issuance costs, in addition to the $0.3 million balance remaining from the initial $100.0 million revolving credit facility, will be amortized to interest expense over the term of the Revolving Credit Facility using the straight-line method.

For the three months ended March 31, 2017 , the Company recognized $4.4 million of interest expense related to the Term Loan Facility, of which $3.8 million was cash and $0.6 million was non-cash accretion of the debt discount recorded for deferred debt issuance costs. As of March 31, 2017 , the Term Loan Facility had a carrying value of $330.8 million , of which $17.8 million is classified as current debt and $313.0 million is classified as long-term debt on the Company's consolidated balance sheets. The Term Loan Facility requires quarterly principal payments of $5.0 million beginning from December 2016 through June 2021, and the remaining principal balance is payable in August 2021. As of March 31, 2017 , the outstanding principal amount for the Term Loan Facility was $340.0 million .

Loss on Early Extinguishment of Debt - Voluntary Prepayment of $50.0 Million of Principal - RBC Term Loan Facility

On February 28, 2017, the Company made a voluntary prepayment in the amount of $50.3 million under its Term Loan Facility, representing $50.0 million of principal amount and $0.3 million of accrued interest thereon. As a result of this voluntary prepayment, for the quarter ended March 31, 2017, the Company recorded a loss on early extinguishment of debt of $1.2 million to write-off a pro rated portion of the related unaccreted debt issuance costs.

2% Convertible Senior Notes due June 2022

On June 30, 2015, the Company issued an aggregate principal amount of $600.0 million of 2.00% Convertible Senior Notes due June 2022 (the “Notes”) in a private placement offering, which are the Company’s senior unsecured obligations. The Notes were issued pursuant to an Indenture dated June 30, 2015 (the “Indenture”) between the Company and Wilmington Trust, N.A. as trustee. The Indenture includes customary covenants and sets forth certain events of default after which the Notes may be due and payable immediately. The Notes will mature on June 15, 2022, unless earlier redeemed, repurchased or converted. The Notes bear interest at a rate of 2.00% per year, and interest is payable semiannually in arrears on June 15 and December 15 of each year, beginning from December 15, 2015.

The conversion rate for the Notes is initially set at 15.7858 shares per $1,000 of principal amount, which is equivalent to an initial conversion price of $63.35 per share of the Company’s common stock. If a Make-Whole Fundamental Change (as defined in the Indenture) occurs or becomes effective prior to the maturity date and a holder elects to convert its Notes in connection with the Make-Whole Fundamental Change, the Company is obligated to increase the conversion rate for the Notes so surrendered by a number of additional shares of the Company’s common stock as prescribed in the Indenture. Additionally, the conversion rate is subject to adjustment in the event of an equity restructuring transaction such as a stock dividend, stock split, spinoff, rights offering, or recapitalization through a large, nonrecurring cash dividend (“standard antidilution provisions,” per FASB ASC 815-40, Contracts in Entity’s Own Equity ("ASC 815-40")).

The Notes are convertible at the option of the holders at any time prior to the close of business on the business day immediately preceding December 15, 2021 only under the following circumstances: