Common Stock Reserved for Issuance

6 Months Ended

Jun. 30, 2015

Equity [Abstract]

Common Stock Reserved for Issuance

7. Common Stock Reserved for Issuance

The Company is required to reserve and keep available out of its authorized but unissued shares of common stock a number of shares sufficient to effect the conversion of all outstanding shares of preferred stock (and preferred stock warrants), plus options granted and available for grant under the incentive plans.

	June 30, 2015		December 31, 2014
Conversion of outstanding Series A convertible preferred stock		252,817		252,817
Conversion of outstanding Series B redeemable convertible preferred stock		1,947,354		1,947,354
Conversion of outstanding Series B-1 redeemable convertible preferred stock		1,478,328		1,392,300
Conversion of outstanding Series C redeemable convertible preferred stock		2,493,017		2,487,770
Conversion of outstanding Series D redeemable convertible preferred stock		11,409,360		11,409,360
Outstanding preferred stock warrants		885,201		976,492
Outstanding and issued stock options		3,294,849		2,138,096
Shares reserved for future option grants		365,535		1,550,101
Total common stock reserved for issuance		22,126,461		22,154,290