Common Stock Purchase Agreement	3 Months Ended
Mar. 30, 2013
Common Stock Purchase Agreement
Common Stock Purchase Agreement	10. Common Stock Purchase Agreement On October 24, 2011, we entered into a common stock purchase agreement (the “Purchase Agreement”) with Aspire Capital Fund, LLC, an Illinois limited liability company (“Aspire Capital”), which provided that, upon the terms and subject to the conditions and limitations set forth therein, Aspire Capital was committed to purchase up to an aggregate of $20.0 million of shares of our common stock (the “Purchase Shares”) over a three year period at purchase prices determined in accordance with the Purchase Agreement. Concurrently with entering into the Purchase Agreement, we also entered into a registration rights agreement with Aspire Capital, dated as of October 24, 2011, in which we agreed to file one or more registration statements as permissible and necessary to register under the Securities Act of 1933, as amended, the sale by Aspire Capital of the shares of our common stock that were issued to Aspire Capital under the Purchase Agreement. We filed a registration statement which was declared effective by the SEC on January 26, 2012. This Agreement was terminated on December 28, 2012 in conjunction with the closing of our public stock offering completed on the same date. We incurred no costs in conjunction with terminating this agreement. As of December 28, 2012, we had sold 100,000 shares of common stock to Aspire Capital pursuant to the Purchase Agreement and, including certain shares of common stock issued to Aspire Capital in connection with the entry into this Agreement, an aggregate of 478,788 shares of common stock had been issued to Aspire Capital pursuant to the Purchase Agreement.

10. Common Stock Purchase Agreement

On October 24, 2011, we entered into a common stock purchase agreement (the “Purchase Agreement”) with Aspire Capital Fund, LLC, an Illinois limited liability company (“Aspire Capital”), which provided that, upon the terms and subject to the conditions and limitations set forth therein, Aspire Capital was committed to purchase up to an aggregate of $20.0 million of shares of our common stock (the “Purchase Shares”) over a three year period at purchase prices determined in accordance with the Purchase Agreement. Concurrently with entering into the Purchase Agreement, we also entered into a registration rights agreement with Aspire Capital, dated as of October 24, 2011, in which we agreed to file one or more registration statements as permissible and necessary to register under the Securities Act of 1933, as amended, the sale by Aspire Capital of the shares of our common stock that were issued to Aspire Capital under the Purchase Agreement. We filed a registration statement which was declared effective by the SEC on January 26, 2012.

This Agreement was terminated on December 28, 2012 in conjunction with the closing of our public stock offering completed on the same date. We incurred no costs in conjunction with terminating this agreement. As of December 28, 2012, we had sold 100,000 shares of common stock to Aspire Capital pursuant to the Purchase Agreement and, including certain shares of common stock issued to Aspire Capital in connection with the entry into this Agreement, an aggregate of 478,788 shares of common stock had been issued to Aspire Capital pursuant to the Purchase Agreement.