Net Loss per Common Share (Tables)

3 Months Ended

Mar. 31, 2019

Earnings Per Share [Abstract]

Potentially Dilutive Securities Excluded from Computation of Diluted Weighted Average Shares

The following potentially dilutive securities have been excluded from the computation of diluted weighted-average shares outstanding as of March 31, 2019 and 2018, as they would be anti-dilutive:

	Three Months Ended March 31,
	2019		2018
Warrants to purchase common stock		3,552,672		28,532
Options to purchase common stock and other stock-based    awards		1,545,719		1,668,219
Total		5,098,391		1,696,751