Consolidated Statements of Operations - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Income Statement [Abstract]
Revenue	$ 568,209,000	$ 553,334,000
Cost of revenue	486,823,000	481,457,000
Gross profit	81,386,000	71,877,000
Operating expenses:
Selling, general and administrative	63,601,000	63,168,000
Amortization of intangibles	630,000	642,000
Total operating expenses	64,231,000	63,810,000
Operating income	17,155,000	8,067,000
Other income (expense):
Interest income (expense), net	(8,627,000)	(6,285,000)
Loss on debt extinguishment	0	(513,000)
Gain on sale of property and equipment	95,000	57,000
Gain (loss) on change in fair value of warrant liability	(1,634,000)	588,000
Gain on embedded derivative	0	388,000
Impairment of goodwill	0	(4,359,000)
Total other expenses	(10,166,000)	(10,124,000)
Income (loss) before income taxes	6,989,000	(2,057,000)
Income tax provision (benefit)	1,182,000	(282,000)
Net income (loss)	$ 5,807,000	$ (1,775,000)
Net income (loss) per share:
Basic (in usd per share)	$ 0.74	$ (0.23)
Diluted (in usd per share)	$ 0.72	$ (0.23)
Weighted average number of shares outstanding:
Basic (in shares)	7,865,089	7,662,362
Diluted (in shares)	8,065,464	7,662,362