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Common Stock Purchase Warrants - Summary of Range of Exercise Prices and Weighted Average Remaining Contractual Life of Warrants (Details) - Warrants [Member]	3 Months Ended
	Mar. 31, 2021 $ / shares shares
Outstanding and exercisable warrants, Number of warrants	26,808,598
Outstanding and exercisable warrants, Weighted average remaining contractual life	4 years 6 months
Exercise Price Range One [Member]
Outstanding and exercisable warrants, Exercise price | $ / shares	$ 2.60
Outstanding and exercisable warrants, Number of warrants	465,712
Outstanding and exercisable warrants, Weighted average remaining contractual life	2 years 3 months 19 days
Exercise Price Range Two [Member]
Outstanding and exercisable warrants, Exercise price | $ / shares	$ 3.00
Outstanding and exercisable warrants, Number of warrants	316,800
Outstanding and exercisable warrants, Weighted average remaining contractual life	2 years
Exercise Price Range Three [Member]
Outstanding and exercisable warrants, Exercise price | $ / shares	$ 3.25
Outstanding and exercisable warrants, Number of warrants	24,300,000
Outstanding and exercisable warrants, Weighted average remaining contractual life	4 years 9 months 18 days
Exercise Price Range Four [Member]
Outstanding and exercisable warrants, Exercise price | $ / shares	$ 3.36
Outstanding and exercisable warrants, Number of warrants	733,333
Outstanding and exercisable warrants, Weighted average remaining contractual life	1 year 8 months 12 days
Exercise Price Range Five [Member]
Outstanding and exercisable warrants, Exercise price | $ / shares	$ 3.65
Outstanding and exercisable warrants, Number of warrants	167,000
Outstanding and exercisable warrants, Weighted average remaining contractual life	1 year 3 months 19 days
Exercise Price Range Six [Member]
Outstanding and exercisable warrants, Exercise price | $ / shares	$ 3.75
Outstanding and exercisable warrants, Number of warrants	25,753
Outstanding and exercisable warrants, Weighted average remaining contractual life	1 year 4 months 24 days
Exercise Price Range Seven [Member]
Outstanding and exercisable warrants, Exercise price | $ / shares	$ 5.00
Outstanding and exercisable warrants, Number of warrants	800,000
Outstanding and exercisable warrants, Weighted average remaining contractual life	9 months 18 days

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