Other Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Other Current Liabilities
Unearned insurance premiums	$ 754	$ 256
Other Liabilities
Unearned insurance premiums	622	1,680
Other long-term liabilities	122	135
Other liabilities	$ 744	1,959
Historic Warrant Liability
Other Liabilities
Historic warrants liability		$ 144