Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Supplemental Cash Flow Elements [Abstract]
Cash paid for interest	$ 425	$ 746	$ 444
Cash paid for federal and state income taxes	3,020	2,251	418
Cash refund for NOL carryback under CARES Act	6,907	3,712	2,703
Non-cash transactions:
Change in accounts payable related to property and equipment additions	(52)	0	(1,237)
Property and equipment acquired under finance leases	7,873	2,083	11,412
Issuance of common shares in asset acquisition	$ 425	$ 0	$ 0