Other Assets (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Insurance collateral deposits	$ 375	$ 721
Excess loss fund	622	622
Accumulated interest income	515	489
State collateral deposits	36	36
Materials and supplies	652	574
Debt issuance costs	229	292
Other	285	293
Total other assets	$ 2,714	$ 3,027