Condensed Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Income Statement [Abstract]
Revenue	$ 129,177	$ 163,856	$ 363,540	$ 437,813
Cost of revenue	104,714	139,685	303,158	375,083
Gross profit	24,463	24,171	60,382	62,730
Operating expenses:
Selling, general and administrative	18,302	17,045	52,679	47,596
Amortization of intangibles	87	109	295	526
Total operating expenses	18,389	17,154	52,974	48,122
Operating income	6,074	7,017	7,408	14,608
Other (expenses) income:
Interest expense, net	(424)	(2,154)	(2,140)	(6,449)
(Loss) gain on disposition of property and equipment	(49)	3	(41)	18
Loss on early debt extinguishment	0	0	(1,961)	0
(Loss) gain on change in fair value of warrant liability	0	(1,371)	14	(1,312)
Total other expenses	(473)	(3,522)	(4,128)	(7,743)
Income before income taxes	5,601	3,495	3,280	6,865
Income tax provision	1,615	970	844	1,445
Net income	$ 3,986	$ 2,525	$ 2,436	$ 5,420
Income per common share:
Basic (in usd per share)	$ 0.39	$ 0.32	$ 0.25	$ 0.69
Diluted (in usd per share)	$ 0.38	$ 0.31	$ 0.24	$ 0.68
Weighted average number of shares outstanding:
Basic (in shares)	10,266,486	7,890,074	9,915,966	7,844,587
Diluted (in shares)	10,491,863	8,107,149	10,145,470	7,969,857