Securities to be registered pursuant to Section 12(b) of the Act:

If this form relates to the registration of a class of securities pursuant to Section 12(b) of the Exchange Act and is effective pursuant to General Instruction A.(c), please check the following box.   x

If this form relates to the registration of a class of securities pursuant to Section 12(g) of the Exchange Act and is effective pursuant to General Instruction A.(d), please check the following box.   ¨

Securities Act registration statement file number to which this form relates: 333-166135.

Securities to be registered pursuant to Section 12(g) of the Act:

None

(Title of Class)

(Title of Class)

The description of the Registrant’s common stock to be registered hereunder set forth under the caption “Description of Capital Stock” in the Registrant’s Registration Statement on Form S-1 (File No. 333-166135) as originally filed with the Securities and Exchange Commission on April 16, 2010, including any subsequent amendments thereto (the “ Form S-1 ”), and in the prospectus to be filed by the Registrant pursuant to Rule 424(b) of the Securities Act of 1933, which prospectus will constitute a part of the Form S-1, is hereby incorporated by reference in response to this item.

In accordance with the “Instructions as to Exhibits” with respect to Form 8-A, no exhibits are required to be filed as part of this registration statement because no other securities of the Registrant are registered on The Nasdaq Global Market and the securities registered hereby are not being registered pursuant to Section 12(g) of the Securities Exchange Act of 1934.

SIGNATURE

Pursuant to the requirements of Section 12 of the Securities Exchange Act of 1934, the Registrant has duly caused this registration statement to be signed on its behalf by the undersigned, thereunto duly authorized.