Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Deferred tax assets (liabilities):
Accrued expenses	$ 147	$ 88
Deferred revenue	129	287
Stock-based compensation	420	449
Fixed assets	116	287
Goodwill	28	102
Inventory	106	197
Intangible amortization	(80)	(1,777)
R&D credit	2,154	2,154
Texas margin tax temporary credit	74	139
Other	101	62
Total deferred tax asset, net of deferred tax liabilities	38,492	35,220
Valuation allowance	(38,492)	(35,220)
Net deferred tax asset	0	0
Federal
Deferred tax assets (liabilities):
Tax benefit of operating loss carry forward	28,459	26,902
State
Deferred tax assets (liabilities):
Tax benefit of operating loss carry forward	$ 6,429	$ 6,225