Income Taxes - Components of Deferred Tax Assets (Liabilities) (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Deferred tax assets:
Accrued expenses	$ 2,096	$ 850
Allowance for doubtful accounts	71	81
Intangibles	784	987
Goodwill	3,746	4,257
Startup costs	91	101
Percentage of completion	0	105
Stock-based compensation	501	679
Net operating losses and credits	0	841
Interest	0	507
Lease liabilities	5,268	5,960
Accrued bonuses and commissions	2,030	6
Warrant	535	101
Other	0	69
Total deferred tax assets	15,122	14,544
Deferred tax liabilities:
Fixed assets	(3,813)	(3,897)
Right-of-use assets	(4,975)	(5,586)
Debt discounts	(155)	(275)
Percentage of completion	(92)	0
Total deferred tax liabilities	(9,035)	(9,758)
Net deferred tax asset	$ 6,087	$ 4,786