Net (Loss) Income Per Common Share Data (Tables)

3 Months Ended

Mar. 31, 2019

Earnings Per Share [Abstract]

Schedule of Securities Excluded from Calculation of Diluted Net Loss Per Share

The following securities were excluded from the calculation of diluted net loss per share because their effect would have been anti-dilutive for the periods presented:

	Three Months Ended
	March 31,
	2019		2018
Anti-dilutive equity awards:
Stock options		7,612,104		8,901,645
Restricted stock units		202,888		51,267
Warrants		—		600,000