Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Deferred tax assets:
Accounts receivable, principally due to allowance for doubtful accounts	$ 33	$ 29
Allowance for inventory obsolescence and amortization	210	315
Accrued liabilities not currently deductible	1,151	1,713
Stock-based compensation	7,943	7,993
Accrued compensation	915	648
Lease liabilities	3,349	3,813
Section 163(j) interest limitation	0	54
Goodwill	34,009	37,394
Capitalized research and development costs	362	0
Net operating loss carryforwards - federal	6,034	5,681
Net operating loss carryforwards - state	1,155	1,014
R&D tax credit	3,760	2,645
Total gross deferred tax assets	58,921	61,299
Less valuation allowance	(57,559)	(55,588)
Total deferred tax assets, net of valuation allowance	1,362	5,711
Deferred tax liabilities:
Amortization and depreciation	(86)	(3,945)
Right-of-use assets	(2,034)	(2,489)
Total deferred tax liabilities	(2,120)	(6,434)
Net deferred tax liabilities	$ (758)	$ (723)