Common Stock Reserved for Issuance (Tables)

3 Months Ended

Mar. 31, 2016

Equity [Abstract]

Schedule of 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 options granted and available for grant under the incentive plans and shares reserved for issuance under the employee stock purchase plan.

	March 31, 2016		December 31, 2015
Outstanding and issued stock options		4,153,460		3,522,813
Shares reserved for future option grants		3,978,883		3,523,879
Shares reserved under the 2015 employee stock purchase plan		700,000		700,000
Total common stock reserved for issuance		8,832,343		7,746,692