Fair Value Measurements - Fair Value Methodology (Details) $ in Thousands |
Dec. 31, 2020
USD ($)
|
|---|---|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | |
| Principal Amount | $ 3,612 |
| 2019 Convertible Promissory Notes | |
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | |
| Principal Amount | 3,000 |
| Fair Value | $ 3,612 |