Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Income Statement
Contract revenues	$ 153,309	$ 166,620
Costs of contract revenues	137,854	146,862
Gross profit	15,455	19,758
Selling, general and administrative expenses	14,630	15,869
Amortization of intangible assets	380	516
Gain on disposal of assets, net	(1,610)	(992)
Operating income	2,055	4,365
Other (expense) income:
Other income	37	97
Interest income	26	40
Interest expense	(1,040)	(1,402)
Other expense, net	(977)	(1,265)
Income before income taxes	1,078	3,100
Income tax expense	150	377
Net income	$ 928	$ 2,723
Basic earnings per share (in dollars per share)	$ 0.03	$ 0.09
Diluted earnings per share (in dollars per share)	$ 0.03	$ 0.09
Shares used to compute income per share:
Basic (in shares)	30,465,475	29,653,409
Diluted (in shares)	30,499,978	29,655,557