Fair Value Measurement - Warrants (Details) - Warrant |
3 Months Ended |
|---|---|
|
Mar. 31, 2020
USD ($)
| |
| Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] | |
| Fair value, liability, beginning balance | $ 16,335,000 |
| Fair value of new warrants issued | 0 |
| Change in fair value for the period | (9,145,000) |
| Fair value, liability, ending balance | $ 7,190,000 |