Stockholders' Equity- Schedule of Common Stock Reserved for Issuance(Details) - shares	Mar. 31, 2016	Dec. 31, 2015
Class Of Stock [Line Items]
Shares reserved for future issuance, shares	3,107,792	3,070,718
Options Issued and Outstanding
Class Of Stock [Line Items]
Shares reserved for future issuance, shares	1,910,181	1,318,647
2015 Stock Option and Incentive Plan
Class Of Stock [Line Items]
Shares reserved for future issuance, shares	942,611	1,497,071
2015 Employee Stock Purchase Plan
Class Of Stock [Line Items]
Shares reserved for future issuance, shares	255,000	255,000