Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Income Statement
Contract revenues	$ 145,875	$ 183,713	$ 299,184	$ 350,333
Costs of contract revenues	133,574	162,969	271,428	309,831
Gross profit	12,301	20,744	27,756	40,502
Selling, general and administrative expenses	13,715	16,512	28,345	32,381
Amortization of intangible assets	381	517	761	1,033
Gain on disposal of assets, net	(7,361)	(369)	(8,971)	(1,361)
Operating income	5,566	4,084	7,621	8,449
Other (expense) income:
Other income	72	39	109	136
Interest income	25	54	51	94
Interest expense	(2,943)	(1,169)	(3,983)	(2,571)
Other expense, net	(2,846)	(1,076)	(3,823)	(2,341)
Income before income taxes	2,720	3,008	3,798	6,108
Income tax (benefit) expense	(810)	980	(660)	1,357
Net income	$ 3,530	$ 2,028	$ 4,458	$ 4,751
Basic earnings per share (in dollars per share)	$ 0.12	$ 0.07	$ 0.15	$ 0.16
Diluted earnings per share (in dollars per share)	$ 0.11	$ 0.07	$ 0.15	$ 0.16
Shares used to compute income per share:
Basic (in shares)	30,671,952	30,031,188	30,569,284	29,842,298
Diluted (in shares)	30,702,151	30,031,188	30,601,669	29,842,298