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Income Taxes - Net Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Income Taxes
Deferred revenue	$ 3	$ 11
Basis difference in intangible assets	6,080	6,604
Inventory reserve	880	2,258
Net operating loss carryforwards	4,730	3,075
Research and development tax credits	115	48
Accrued expenses	108	120
Stock-based compensation	210	215
Allowance for sales returns and doubtful accounts	81	81
Difference in property and equipment basis	(108)	(83)
Convertible debt	(110)	(110)
Capitalized research expenditure	1,507	922
Other	337	364
Total net deferred income tax asset	13,833	13,505
Less: Valuation allowance	(13,833)	(13,505)
Net deferred income tax asset (liability)	$ 0	$ 0

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