Quarterly report pursuant to Section 13 or 15(d)

Convertible Preferred Stock

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Convertible Preferred Stock
6 Months Ended
Jun. 30, 2015
Temporary Equity Disclosure [Abstract]  
Convertible Preferred Stock
Convertible Preferred Stock
The Company issued multiple series of convertible preferred stock between 2000 and January 2014. In March 2014, the Company amended its amended and restated certificate of incorporation to require the automatic conversion of all series of convertible preferred stock into common stock upon the completion of a public offering of common stock with gross proceeds of at least $20,000. In May 2014, upon completion of the IPO, all outstanding shares of convertible preferred stock were converted into an aggregate of 1,691,884 shares of common stock at their respective conversion prices.
Warrants Associated with Preferred Stock Issuances
In July 2006, the Company issued warrants to purchase 196,923 shares of Series C-1 Convertible Preferred Stock, which converted into the right to purchase 14,033 shares of our common stock in connection with our IPO, however, we refer to these warrants as our Series C-1 Preferred warrants. The Series C-1 Preferred warrants were issued in conjunction with a loan financing agreement with an original exercise price of $3.25 per share of Series C-1 Preferred, which converted into an exercise price of $45.61 per share of common stock in connection with our IPO. These warrants remain outstanding as of June 30, 2015 and will expire on May 7, 2019, which is the five year anniversary of the Company's IPO. The fair value at the date of grant for these instruments was $459, which was recorded as a debt discount. The debt discount related to these warrants was fully amortized as of December 31, 2010. The Company determined that the warrants should be recorded as a derivative liability and stated at fair value at each reporting period. The Company recorded other income associated with the fair value adjustment for these warrants of $0 for both the three and six months ended June 30, 2015, and $0 and $37 for the three and six months ended June 30, 2014, respectively.
On December 11, 2013, the Company entered into an agreement to sell 1,785,712 shares of Series D-2 Convertible Preferred Stock ("Series D-2 Preferred") at $1.40 per share for an aggregate price of $2,500 (the “Series D-2 Purchase Agreement”), less issuance costs of $95. The Series D-2 Purchase Agreement included warrants to purchase 87,532 shares of the Company’s common stock at $0.20 per share. The fair value of the warrants on the date of issuance was $4,214, which was recorded as a discount to the Series D-2 Preferred. The fair value of the warrants was $1,714 above the face amount of the Series D-2 Preferred and this excess was expensed to derivative fair value adjustment at issuance. As described in Note 7, the warrants were classified as a derivative liability and were stated at fair value at each reporting period end date prior to being exercised in May 2014 in conjunction with the Company’s IPO.
On January 31, 2014, the Company sold 388,641 shares of Series D-2 Preferred to related parties under the Series D-2 Purchase Agreement at $1.40 per share, for an aggregate price of $544. The sale also included warrants to purchase 19,048 shares of the Company’s common stock at $0.20 per share. The fair value of the warrants on the date of issuance was $906. The fair value of the warrants was $362 above the face amount of the Series D-2 Preferred and this excess was expensed to derivative fair value adjustment at issuance. As described in Note 7, the warrants were classified as a derivative liability and were stated at fair value at each reporting period end date prior to being exercised in May 2014 in conjunction with the Company’s IPO.