Basic and Diluted Loss per Common Share (Tables)

9 Months Ended

Sep. 30, 2017

Earnings Per Share [Abstract]

Summary of Securities Excluded From Calculation of Weighted Average Common Shares

The following securities have been excluded from the calculation of weighted average common shares outstanding because the effect is anti-dilutive or performance or market conditions had not been met at the end of the period:

	Three Months Ended September 30,		Nine Months Ended September 30,
	2017	2016	2017	2016
Convertible preferred stock:
Series A convertible preferred stock	—	12,043,108	—	12,043,108
Series B convertible preferred stock	—	6,120,050	—	6,120,050
Warrant to purchase Series A convertible preferred stock	—	84,360	—	84,360
Stock options	7,383,928	6,699,048	7,383,928	6,699,048
Restricted stock units	42,925	—	42,925	—