Consolidated Statements of Operations - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Income Statement
Contract revenues	$ 711,778	$ 748,322	$ 601,360
Costs of contract revenues	650,115	697,580	560,393
Gross profit	61,663	50,742	40,967
Selling, general and administrative expenses	69,431	62,503	60,181
Amortization of intangible assets	427	1,239	1,521
Gain on disposal of assets, net	(8,455)	(4,970)	(11,418)
Intangible asset impairment loss	6,890
Operating loss	(6,630)	(8,030)	(9,317)
Other (expense) income:
Other income	641	199	199
Interest income	103	104	136
Interest expense	(11,659)	(4,456)	(5,076)
Other expense, net	(10,915)	(4,153)	(4,741)
Loss before income taxes	(17,545)	(12,183)	(14,058)
Income tax expense	330	429	502
Net loss	$ (17,875)	$ (12,612)	$ (14,560)
Basic loss per share (in dollars per share)	$ (0.55)	$ (0.40)	$ (0.47)
Diluted loss per share (in dollars per share)	$ (0.55)	$ (0.40)	$ (0.47)
Shares used to compute loss per share:
Basic (in shares)	32,346,992	31,402,328	30,763,527
Diluted (in shares)	32,346,992	31,402,328	30,763,527