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v3.21.2

Fair Value Measurements - Schedule of warrant derivative liabilities (Details) | Mar. 31, 2021 | Dec. 31, 2020
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Expected Life [Member] | Strome Warrants [Member] |  |
Warrants term | 2 years 2 months 16 days | 2 years 5 months 12 days
Expected Life [Member] | B. Riley Warrants [Member] |  |
Warrants term | 4 years 6 months 18 days | 4 years 9 months 14 days
Measurement Input, Risk Free Interest Rate [Member] | Strome Warrants [Member] |  |
Warrants measurement input | 0.0016 | 0.0013
Measurement Input, Risk Free Interest Rate [Member] | B. Riley Warrants [Member] |  |
Warrants measurement input | 0.0092 | 0.0036
Volatility Factor [Member] | Strome Warrants [Member] |  |
Warrants measurement input | 1.5037 | 1.5055
Volatility Factor [Member] | B. Riley Warrants [Member] |  |
Warrants measurement input | 1.5148 | 1.4095
Dividend Rate [Member] | Strome Warrants [Member] |  |
Warrants measurement input | 0 | 0
Dividend Rate [Member] | B. Riley Warrants [Member] |  |
Warrants measurement input | 0 | 0
Transaction Date Closing Market [Member] | Strome Warrants [Member] |  |
Warrants measurement input | 0.0091 | 0.0060
Transaction Date Closing Market [Member] | B. Riley Warrants [Member] |  |
Warrants measurement input | 0.0091 | 0.0060
Exercise Price [Member] | Strome Warrants [Member] |  |
Warrants measurement input | 0.50 | 0.50
Exercise Price [Member] | B. Riley Warrants [Member] |  |
Warrants measurement input | 1.00 | 1.0

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