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Income Taxes - Net Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Income Taxes
Deferred revenue	$ 11	$ 9
Basis difference in intangible assets	6,604	1,319
Inventory reserve	2,258	2,377
Net operating loss carryforwards	3,075	7,121
Research and development tax credits	48	1,579
Accrued expenses	120	43
Stock-based compensation	215	308
Allowance for sales returns and doubtful accounts	81	83
Difference in property and equipment basis	(83)	(124)
Convertible debt	(110)	(112)
Capitalized research expenditure	922	0
Other	364	581
Total net deferred income tax asset	13,505	13,184
Less: Valuation allowance	(13,505)	(13,184)
Net deferred income tax asset (liability)	$ 0	$ 0

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