Fair Value Measurements - Change in Level 3 (Details) - USD ($) $ in Thousands |
3 Months Ended | |
|---|---|---|
Mar. 31, 2022 |
Mar. 31, 2021 |
|
| Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] | ||
| Loss on revaluation of warrants issued in connection with the February 2021, June 2020, December 2019 and May 2019 financings | $ 100 | $ (11) |
| Warrant Liability | ||
| Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] | ||
| Beginning balance | 1,550 | |
| Loss on revaluation of warrants issued in connection with the February 2021, June 2020, December 2019 and May 2019 financings | 100 | |
| Ending balance | $ 1,650 | |
| X | ||||||||||
- Definition Gain (Loss) On Warrant Liability No definition available.
|
| X | ||||||||||
- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. No definition available.
|
| X | ||||||||||
- Definition Fair value of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Details
|