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Income Taxes - Reconciliation of Differences between Federal Statutory and Effective Income Tax Rate (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Income Tax Disclosure [Abstract]
At statutory rate	$ (821)	$ (12,535)	$ 5,245
State taxes, net of U.S. federal benefit	(162)	(757)	(99)
Foreign taxes	0	0	(223)
Federal tax deductions	(3,299)	357	(5)
Change in applicable tax rate	26	286	478
Provision to return permanent difference	(17)	340	(20)
R&D credits	(209)	67	(159)
Fuel tax credit	(142)	(125)	(90)
Foreign tax credit	0	0	153
Foreign branch loss	0	0	50
Gain on bargain purchase	0	0	(8,316)
Unrecognized tax benefits	70	2,163	0
NOL carryback/carryforward	14	1,186	(10,046)
Nondeductible asset basis	909	0	0
Compensation deduction limitation	426	0	0
Other	0	0	52
Total income tax benefit	$ (3,205)	$ (9,017)	$ (12,980)

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