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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, 2020 $ / shares shares
Outstanding and exercisable warrants, Number of warrants | 4,860,323
Outstanding and exercisable warrants, Weighted average remaining contractual life | 2 years 6 months
Exercise Price Range One [Member] |
Outstanding and exercisable warrants, Exercise price | $ / shares | $ 1.40
Outstanding and exercisable warrants, Number of warrants | 142,750
Outstanding and exercisable warrants, Weighted average remaining contractual life | 4 years 8 months 12 days
Exercise Price Range Two [Member] |
Outstanding and exercisable warrants, Exercise price | $ / shares | $ 1.81
Outstanding and exercisable warrants, Number of warrants | 571,428
Outstanding and exercisable warrants, Weighted average remaining contractual life | 4 years 4 months 24 days
Exercise Price Range Three [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 | 3 years 3 months 19 days
Exercise Price Range Four [Member] |
Outstanding and exercisable warrants, Exercise price | $ / shares | $ 3.00
Outstanding and exercisable warrants, Number of warrants | 701,667
Outstanding and exercisable warrants, Weighted average remaining contractual life | 3 years
Exercise Price Range Five [Member] |
Outstanding and exercisable warrants, Exercise price | $ / shares | $ 3.25
Outstanding and exercisable warrants, Number of warrants | 120,000
Outstanding and exercisable warrants, Weighted average remaining contractual life | 2 years 8 months 12 days
Exercise Price Range Six [Member] |
Outstanding and exercisable warrants, Exercise price | $ / shares | $ 3.36
Outstanding and exercisable warrants, Number of warrants | 680,000
Outstanding and exercisable warrants, Weighted average remaining contractual life | 1 year 10 months 25 days
Exercise Price Range Seven [Member] |
Outstanding and exercisable warrants, Exercise price | $ / shares | $ 3.36
Outstanding and exercisable warrants, Number of warrants | 200,000
Outstanding and exercisable warrants, Weighted average remaining contractual life | 2 years 10 months 25 days
Exercise Price Range Eight [Member] |
Outstanding and exercisable warrants, Exercise price | $ / shares | $ 3.65
Outstanding and exercisable warrants, Number of warrants | 200,000
Outstanding and exercisable warrants, Weighted average remaining contractual life | 2 years 2 months 12 days
Exercise Price Range Nine [Member] |
Outstanding and exercisable warrants, Exercise price | $ / shares | $ 3.75
Outstanding and exercisable warrants, Number of warrants | 94,000
Outstanding and exercisable warrants, Weighted average remaining contractual life | 2 years 4 months 24 days
Exercise Price Range Ten [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 | 1 year 9 months 18 days
Exercise Price Range Eleven [Member] |
Outstanding and exercisable warrants, Exercise price | $ / shares | $ 13.43
Outstanding and exercisable warrants, Number of warrants | 879,766
Outstanding and exercisable warrants, Weighted average remaining contractual life | 9 months 18 days
Exercise Price Range Twelve [Member] |
Outstanding and exercisable warrants, Exercise price | $ / shares | $ 16.50
Outstanding and exercisable warrants, Number of warrants | 5,000
Outstanding and exercisable warrants, Weighted average remaining contractual life | 3 months 19 days

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