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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
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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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