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Fair Value Measurements - Schedule of warrant derivative liabilities (Details) - Integer | Jun. 30, 2020 | Dec. 31, 2019
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Expected Life [Member] | Strome Warrants [Member] |  |
Warrants term | 2 years 11 months 15 days | 3 years 5 months 12 days
Expected Life [Member] | B. Riley Warrants [Member] |  |
Warrants term | 5 years 3 months 19 days | 5 years 9 months 18 days
Measurement Input, Risk Free Interest Rate [Member] | Strome Warrants [Member] |  |
Warrants measurement input | 0.18 | 1.62
Measurement Input, Risk Free Interest Rate [Member] | B. Riley Warrants [Member] |  |
Warrants measurement input | 0.29 | 1.76
Volatility Factor [Member] | Strome Warrants [Member] |  |
Warrants measurement input | 138.50 | 144.54
Volatility Factor [Member] | B. Riley Warrants [Member] |  |
Warrants measurement input | 135.13 | 127.63
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 | 0.65 | 0.80
Transaction Date Closing Market [Member] | B. Riley Warrants [Member] |  |
Warrants measurement input | 0.65 | 0.80
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 | 1.00

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