Income Taxes - Schedule of deferred taxes (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Deferred tax assets (liabilities):
Allowance for doubtful accounts	$ 298	$ 345
Inventories	296	99
Accrued payroll and benefits	418	513
Goodwill and intangible assets	2,135	951
Excess interest expense	1,090	447
Tax credits and NOLs	3,226	1,427
Lease liabilities	2,412	2,604
Other	300	339
Deferred tax asset before valuation allowance	10,175	6,725
Valuation allowance	(3,354)	(684)
Deferred tax asset	6,821	6,041
Property, plant, and equipment	(1,975)	(2,544)
Lease assets	(2,348)	(2,495)
Other	(119)	(109)
Deferred tax liability	(4,442)	(5,148)
Total deferred tax asset (liability)	$ 2,379	$ 893