Net Income (Loss) Per Common Share - Basic and Diluted - Schedule of Common Stock Equivalents Outstanding (Details) - shares	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Stock options	21,102,500	22,275,000	20,400,000
Warrants	7,065,000	50,090,000
Common stock equivalents	69,135,000	114,920,000
Series B Preferred Stock
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Weighted average shares, outstanding	337,500	425,000
Series C Preferred Stock
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Weighted average shares, outstanding	40,630,000	42,130,000