Stockholders' Equity

9 Months Ended

Sep. 30, 2015

Equity [Abstract]

Stockholders' Equity

7. STOCKHOLDERS’ EQUITY

Common Stock

As of September 30, 2015, the Company had reserved 2,551,702 shares of common stock for issuance upon the exercise of outstanding common stock options and the vesting of restricted stock units (“RSUs”). Also, 1,516,100 shares of the Company’s common stock were reserved for future grants of stock options (or other similar equity instruments) under the Company’s 2007 Stock Incentive Plan (the “2007 Plan”) as of September 30, 2015. In addition, 267,826 shares of the Company’s common stock were reserved for future exercise of outstanding warrants as of September 30, 2015.

On January 13, 2014, the Company completed a public offering of common stock in which a total of 3,047,500 shares were sold including 397,500 shares pursuant to the full exercise of the underwriter’s over-allotment option, at a price of $10.65 per share. The Company raised a total of $32.5 million in gross proceeds from the offering, or approximately $30.3 million in net proceeds after deducting the underwriting discount and expenses of $2.3 million.

On March 20, 2014, certain stockholders completed a public offering of 2,875,000 shares of common stock and the Company sold 375,000 shares pursuant to the full exercise of the underwriter’s over-allotment option each at a price of $13.00 per share. The Company raised a total of $4.9 million in gross proceeds from the offering, or approximately $4.4 million in net proceeds after deducting the underwriting discount and expenses of $319,000 and estimated costs of $148,000.

Warrants

For the three and nine months ended September 30, 2015, no common stock warrants were exercised. At September 30, 2015 and December 31, 2014, there were 267,826 common stock warrants outstanding.