Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Income Statement
Contract revenues	$ 194,575	$ 145,875	$ 369,506	$ 299,184
Costs of contract revenues	180,244	133,574	342,359	271,428
Gross profit	14,331	12,301	27,147	27,756
Selling, general and administrative expenses	17,233	13,715	33,403	28,345
Amortization of intangible assets	310	381	620	761
Gain on disposal of assets, net	(364)	(7,361)	(1,173)	(8,971)
Operating (loss) income	(2,848)	5,566	(5,703)	7,621
Other (expense) income:
Other income	55	72	99	109
Interest income	16	25	35	51
Interest expense	(958)	(2,943)	(1,698)	(3,983)
Other expense, net	(887)	(2,846)	(1,564)	(3,823)
(Loss) income before income taxes	(3,735)	2,720	(7,267)	3,798
Income tax (benefit) expense	(681)	(810)	643	(660)
Net (loss) income	$ (3,054)	$ 3,530	$ (7,910)	$ 4,458
Basic (loss) earnings per share (in dollars per share)	$ (0.10)	$ 0.12	$ (0.26)	$ 0.15
Diluted (loss) earnings per share (in dollars per share)	$ (0.10)	$ 0.11	$ (0.26)	$ 0.15
Shares used to compute (loss) income per share:
Basic (in shares)	30,949,298	30,671,952	30,960,277	30,569,284
Diluted (in shares)	30,949,298	30,702,151	30,960,277	30,601,669