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Note 10 - Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Reserves	$ 249	$ 472
Property and equipment	57	165
Accrued expenses	514	593
Right-of-use Asset	(254)	(253)
Right-of-use Liability	254	253
IRC 163(j) Interest Carryforward	704	18
Debt issuance costs	135	286
Non-qualified stock options	1,708	1,469
IRC Section 174	593	196
R&D credits	2,312	2,312
Net foreign carryforwards	3,753	3,664
US net operating loss and contribution carryforwards	38,010	37,953
Intangibles	(3,818)	(3,737)
Total deferred tax liabilities, net	44,217	43,391
Valuation allowance	(44,290)	(43,419)
Net deferred tax liabilities	$ (73)	$ (28)

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