Condensed Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Income Statement [Abstract]
Revenue	$ 138,772	$ 133,746
Cost of revenue	120,548	114,123
Gross profit	18,224	19,623
Operating expenses:
Selling, general and administrative expenses	16,799	16,045
Amortization of intangibles	143	175
Total operating expenses	16,942	16,220
Operating income	1,282	3,403
Other income (expenses):
Interest expense, net	(2,158)	(833)
Gain on disposition of property and equipment	29	12
Gain on change in fair value of warrant liability	161	0
Total other expenses	(1,968)	(821)
Income (loss) before income taxes	(686)	2,582
Income tax provision (benefit)	(634)	735
Net income (loss)	$ (52)	$ 1,847
Income (loss) per common share:
Basic (in usd per share)	$ (0.01)	$ 0.24
Diluted (in usd per share)	$ (0.01)	$ 0.24
Weighted average number of shares outstanding:
Basic (in shares)	7,797,673	7,643,133
Diluted (in shares)	7,797,673	7,667,913