Fair Value Measurement - Convertible Note (Details) - Convertible Notes - USD ($) |
12 Months Ended | |
|---|---|---|
Dec. 31, 2019 |
Dec. 31, 2018 |
|
| Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] | ||
| Fair value, liability, beginning balance | $ 0 | $ 0 |
| Fair value of new issuances | 38,520,000 | 0 |
| Conversion of Convertible Note into common stock | (481,728) | 0 |
| Change in fair value for the year | 981,728 | 0 |
| Fair value, liability, ending balance | $ 39,020,000 | $ 0 |