Convertible Preferred Stock	12 Months Ended
Dec. 31, 2013
Equity [Abstract]
Convertible Preferred Stock	9. Convertible Preferred Stock Upon the closing of the IPO on June 24, 2013, all of the outstanding shares of the Company’s convertible preferred stock were converted into 16,389 shares of its common stock. As of December 31, 2013, the Company does not have any convertible preferred stock issued or outstanding. As of December 31, 2012, the authorized capital stock of the Company included 317,252 shares of preferred stock, par value $0.01 per share, of which: (i) 18,817 shares have been designated as Series A-1 Preferred Stock, (ii) 22,304 shares have been designated as Series A-2 convertible preferred stock (“Series A-2 Preferred Stock”), (iii) 115,779 shares have been designated as Series B Preferred Stock, (iv) 39,943 shares have been designated as Series C convertible preferred stock (“Series C Preferred Stock”), and (iv) 120,409 shares have been designated as Series D convertible preferred stock (“Series D Preferred Stock”) and all collectively “Preferred Stock.” *Extinguishment of preferred stock* In connection with the issuance of the Series D Preferred Stock, the rights, preferences, and privileges for all classes of preferred stock then outstanding were modified. More specifically, the redemption privileges were eliminated in their entirety for Series A-1 Preferred Stock, Series A-2 Preferred Stock, Series B Preferred Stock, and Series C Preferred Stock. Additionally, the dividend rights changed from cumulative dividend rights to non-cumulative dividend rights and all accrued, but unpaid dividends on the Company’s Series A-1 Preferred Stock, Series A-2 Preferred Stock, Series B Preferred Stock, and Series C Preferred Stock as of July 23, 2012, were forfeited. Lastly, the liquidation preference for the Series B Preferred Stock was reduced from $0.6524 per share to $0.4893 per share. The Company has accounted for the amendment to the rights, preferences, and privileges of the preferred stock as an extinguishment of the old preferred stock and issuance of new preferred stock due to the significance of the modifications to the substantive contractual terms of the preferred stock and the associated fundamental changes to the nature of the preferred stock. Accordingly, the Company recorded an aggregate gain of $23,114 within stockholders’ deficit equal to the difference between the fair value of the new shares of preferred stock issued and the carrying amount of the old shares of preferred stock extinguished. The Company allocated $9,356 of the gain to additional paid-in capital to recover the amount of additional paid-in capital that had previously been reduced by accreted dividends that were forfeited as part of the extinguishment, while the remaining $13,758 was recorded to accumulated deficit. The gain on extinguishment is reflected in the calculation of net loss available to common stockholders in accordance with FASB ASC Topic 260, Earnings per Share. The fair value of the Series A-1 Preferred Stock, Series A-2 Preferred Stock, Series B Preferred Stock, and Series C Preferred Stock was determined using a hybrid approach based on a probability-weighted average of the expected return method and the option pricing method.

9. Convertible Preferred Stock

Upon the closing of the IPO on June 24, 2013, all of the outstanding shares of the Company’s convertible preferred stock were converted into 16,389 shares of its common stock. As of December 31, 2013, the Company does not have any convertible preferred stock issued or outstanding.

As of December 31, 2012, the authorized capital stock of the Company included 317,252 shares of preferred stock, par value $0.01 per share, of which: (i) 18,817 shares have been designated as Series A-1 Preferred Stock, (ii) 22,304 shares have been designated as Series A-2 convertible preferred stock (“Series A-2 Preferred Stock”), (iii) 115,779 shares have been designated as Series B Preferred Stock, (iv) 39,943 shares have been designated as Series C convertible preferred stock (“Series C Preferred Stock”), and (iv) 120,409 shares have been designated as Series D convertible preferred stock (“Series D Preferred Stock”) and all collectively “Preferred Stock.”

Extinguishment of preferred stock

In connection with the issuance of the Series D Preferred Stock, the rights, preferences, and privileges for all classes of preferred stock then outstanding were modified. More specifically, the redemption privileges were eliminated in their entirety for Series A-1 Preferred Stock, Series A-2 Preferred Stock, Series B Preferred Stock, and Series C Preferred Stock. Additionally, the dividend rights changed from cumulative dividend rights to non-cumulative dividend rights and all accrued, but unpaid dividends on the Company’s Series A-1 Preferred Stock, Series A-2 Preferred Stock, Series B Preferred Stock, and Series C Preferred Stock as of July 23, 2012, were forfeited. Lastly, the liquidation preference for the Series B Preferred Stock was reduced from $0.6524 per share to $0.4893 per share.

The Company has accounted for the amendment to the rights, preferences, and privileges of the preferred stock as an extinguishment of the old preferred stock and issuance of new preferred stock due to the significance of the modifications to the substantive contractual terms of the preferred stock and the associated fundamental changes to the nature of the preferred stock. Accordingly, the Company recorded an aggregate gain of $23,114 within stockholders’ deficit equal to the difference between the fair value of the new shares of preferred stock issued and the carrying amount of the old shares of preferred stock extinguished. The Company allocated $9,356 of the gain to additional paid-in capital to recover the amount of additional paid-in capital that had previously been reduced by accreted dividends that were forfeited as part of the extinguishment, while the remaining $13,758 was recorded to accumulated deficit. The gain on extinguishment is reflected in the calculation of net loss available to common stockholders in accordance with FASB ASC Topic 260, Earnings per Share. The fair value of the Series A-1 Preferred Stock, Series A-2 Preferred Stock, Series B Preferred Stock, and Series C Preferred Stock was determined using a hybrid approach based on a probability-weighted average of the expected return method and the option pricing method.