Net Loss per Common Share (Tables)

12 Months Ended

Dec. 31, 2019

Net Loss per Common Share

Computation of basic and diluted net loss per common share

	Year ended December 31,
	2019		2018		2017
Basic and diluted net loss per common share:
Net loss	$	(68,345,186)	$	(30,965,464)	$	(28,943,392)
Weighted average common shares outstanding—basic and diluted		34,020,257		26,883,656		22,764,606
Net loss per common share—basic and diluted	$	(2.01)	$	(1.15)	$	(1.27)

Schedule of potentially dilutive securities

	December 31,
	2019	2018	2017
Stock options	3,458,447	2,291,163	2,315,638
Warrants	69,656	123,037	2,099,199
Total	3,528,103	2,414,200	4,414,837