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Warrants | 6 Months Ended
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Jun. 30, 2014
Warrants |
Warrants | 10. Warrants In connection with the line of credit secured in April 2012, the Company issued a warrant to purchase 12,797 shares of the Company’s Series D redeemable convertible preferred stock with an exercise price of $7.81 per share and an expiration date in 2022. The warrant was valued at $74 thousand on the date of grant and at $19 thousand as of December 31, 2013. In connection with the line of credit secured in December 2013, the Company issued a warrant to purchase 71,021 shares of the Company’s Series D redeemable convertible preferred stock with an exercise price of $7.81 per share and an expiration date in 2023. The warrant was valued at $107 thousand as of December 31, 2013. As of December 31, 2013, each of the Series D warrants were classified as a liability in the accompanying unaudited condensed consolidated balance sheets and adjusted to fair value due to the fact that they were exercisable into redeemable convertible preferred securities. Upon the closing of the Company’s IPO on April 2, 2014, the warrants to purchase Series D redeemable convertible preferred stock automatically converted into warrants to purchase common stock and the liability at its then fair value of $821 thousand was reclassified to additional paid-in capital. Prior to April 2, 2014, the inputs to the fair value model for the warrants were considered Level 3 inputs under ASC 820, Fair Value Measurements and Disclosures, and all changes in the fair value of the warrants were recorded as a component of interest expense. The Company recorded reductions of interest expense of $5 thousand and $13 thousand for the three and six months ended June 30, 2013, respectively, related to the fair value adjustment of the warrants. The Company recorded interest expense of $7 thousand and $695 thousand for the three and six months ended June 30, 2014, respectively, related to the fair value adjustment of the warrants, which represents a non-cash financing activity for purposes of the condensed consolidated statement of cash flows. On May 22, 2014, the holder of the warrants issued a notice of exercise to the Company to purchase 83,818 shares of common stock. In lieu of payment of the exercise price, the Company withheld from issuance a number of shares equal to the full exercise price divided by the price per share of the Company’s common stock as measured on a volume weighted average price basis over the 10-day trading period immediately prior to May 22, 2014. Consequently, the exercise of the warrants resulted in the issuance of 32,709 shares of the Company’s common stock to the holder of the warrants, which represents a non-cash financing activity for purposes of the condensed consolidated statement of cash flows.

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