Stockholders' Equity (Details)	9 Months Ended
	Sep. 30, 2020 $ / shares shares
Stockholders' Equity
Outstanding at Number of Warrants, Beginning Balance | shares	9,843,720
Issued Number of Warrants | shares	0
Exercised Number of Warrants | shares	(82,304)
Expired Number of Warrants | shares	(1,489,707)
Outstanding at Number of Warrants, Ending Balance | shares	8,271,709
Exercisable Number of Warrants | shares	8,271,709
Outstanding Weighted Average Exercise Price, Beginning Balance | $ / shares	$ 4.43
Issued Weighted Average Exercise Price | $ / shares	0
Exercised Weighted Average Exercise Price | $ / shares	1.69
Expired Weighted Average Exercise Price | $ / shares	3.75
Outstanding Weighted Average Exercise Price, at Ending Balance | $ / shares	4.58
Exercisable Weighted Average Exercise Price | $ / shares	$ 4.58