Operating Segments - Segment Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Segment Reporting Information [Line Items]
Revenue	$ 490,351	$ 568,209
Gross profit	85,910	81,386
Selling, general and administrative	71,436	63,601
Amortization of intangibles	484	630
Operating income	13,990	17,155
Interest expense, net	(2,568)	(8,627)
Loss on debt extinguishment	(1,961)	0
Gain (loss) on change in fair value of warrant liability	14	(1,634)
Gain on sale of property and equipment	2	95
Total unallocated amounts	(4,513)	(10,166)
Income before income taxes	9,477	6,989
Depreciation and amortization	5,948	6,171
Operating Segments | GCR
Segment Reporting Information [Line Items]
Revenue	350,015	440,979
Gross profit	45,409	45,115
Selling, general and administrative	37,558	37,708
Depreciation and amortization	4,085	4,187
Operating Segments | ODR
Segment Reporting Information [Line Items]
Revenue	140,336	127,230
Gross profit	40,501	36,271
Selling, general and administrative	31,277	24,825
Depreciation and amortization	1,379	1,354
Corporate, Non-Segment
Segment Reporting Information [Line Items]
Selling, general and administrative	2,601	1,068
Depreciation and amortization	$ 484	$ 630