Net Loss per Share (Tables)

6 Months Ended

Jun. 30, 2018

Earnings Per Share [Abstract]

Schedule of Securities Not Included in Diluted per Share Calculations

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

	Six Months Ended June 30,
		2018	2017
Options to purchase common stock		283,259	303,835
Warrants to purchase common stock		2,826,687	66,845
Total		3,109,946	370,680