Net Loss per Share

3 Months Ended

Mar. 31, 2019

Earnings Per Share [Abstract]

Net Loss per Share

12. Net Loss per Share

Basic net loss per share is calculated by dividing net loss by the weighted-average number of common shares outstanding during the period and excludes any dilutive effects of stock-based awards and warrants. Diluted net loss per share is computed giving effect to all potentially dilutive common shares, including common stock issuable upon exercise of stock options and warrants. As of March 31, 2019, all potentially dilutive common shares were determined to be anti-dilutive after evaluation.

Securities that were not included in the diluted per share calculations because they would be anti-dilutive were as follows (in shares):

	Three Months Ended March 31,
		2019	2018
Options to purchase common stock		535,243	252,554
Warrants to purchase common stock		2,821,144	382,645
Total		3,356,387	635,199