UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 10-Q/A

(Amendment No. 1)

For the quarterly period ended March 31, 2011

OR

For the transition period from                      to                     

Commission file number 001-33998

(Exact name of registrant as specified in its charter)

Indicate by check mark whether the Registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports) and (2) has been subject to such filing requirements for the past 90 days.    Yes  x    No  ¨

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§232.405) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).    Yes  x    No  ¨

Indicate by check mark whether the Registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer or a smaller reporting company. See definitions of “large accelerated filer,” “accelerated filer” and “smaller reporting company” in Rule 12b-2 of the Exchange Act.

Indicate by check mark whether the Registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).    Yes  ¨    No  x

The number of shares outstanding of registrant’s common stock at April 29, 2011 was 16,703,419 shares.

EXPLANATORY NOTE

We are filing this Amendment No. 1 to our Quarterly Report on Form 10-Q for the quarter ended March 31, 2011 only to amend the Exhibit List with regard to Exhibit 10(a) and file Exhibit 10(a).

This Amendment No. 1 to our Form 10-Q for the quarter ended March 31, 2011 does not reflect events occurring after the filing of our original Form 10-Q. As required by Rule 12b-15 of the Securities Exchange Act of 1934, new certifications by our principal executive officer and principal financial officer are filed herewith as exhibits to this Amendment. No other modifications or changes have been made to the disclosures or information contained in our Form 10-Q for the quarter ended March 31, 2011, as originally filed.

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PART II. OTHER INFORMATION

See Exhibit Index.

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SIGNATURES

Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

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EXHIBIT INDEX

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