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Employee benefit plan | 12 Months Ended
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Dec. 31, 2012
Employee benefit plan |
Employee benefit plan | 14. Employee benefit plan We have a defined contribution savings plan in accordance with Section 401(k) of the Internal Revenue Code. This plan covers substantially all employees who meet the IRS requirements and allows participants to defer a portion of their annual compensation on a pre-tax basis. Company contributions to the plan may be made at the discretion of the board of directors. Employer contributions of $347, $285 and $244 were made to the plan by us in 2012, 2011 and 2010, respectively.

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