Stockholders' Equity (Tables)

9 Months Ended

Sep. 30, 2020

Stockholders' Equity

Schedule of stock purchase warrants activity

	Number of	Weighted Average
	Warrants	Exercise Price
Outstanding at January 1, 2020	9,843,720	$	4.43
Issued	—	$	—
Exercised	(82,304)	$	1.69
Expired	(1,489,707)	$	3.75
Outstanding at September 30, 2020	8,271,709	$	4.58
Exercisable at September 30, 2020	8,271,709	$	4.58