Fair Value Measurements - Schedule of fair value on recurring basis (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Warrant liabilities
Warrant liabilities, non-current	$ 669	$ 15,389
Recurring
Warrant liabilities
Total	669,000	15,389
Recurring | Level 2 | 5-Year Private Warrants
Warrant liabilities
Warrant liabilities, non-current	664,000	15,327
Recurring | Level 2 | Seller Warrants
Warrant liabilities
Warrant liabilities, non-current	$ 5,000	$ 62