Note 16 - Income Taxes (Tables)

12 Months Ended

Dec. 31, 2023

Notes Tables

Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]

	Year Ended December 31,
	2023			2022
Current:
Federal	$	(141	)	$	(60	)
State		(9	)		(20	)
Foreign		(37	)		(34	)
Sub-total	$	(187	)	$	(114	)
Deferred:
Federal	$	(17	)	$	17
State		—			—
Foreign		—			—
Sub-total	$	(17	)	$	17
Total	$	(204	)	$	(97	)

Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]

	Year Ended						Year Ended
	December 31,						December 31,
	2023			%			2022			%
Income taxes computed at statutory rates	$	9,609			(21	)%	$	12,537			(21	)%
(Increases) decreases resulting from:
Change in valuation allowance		(11,716	)		26	%		(13,463	)		22	%
NOL surrendered for refundable tax credit		(1,607	)		4	%		(2,164	)		4	%
Foreign research deductions and credits		803			(2	)%		1,329			(2	)%
Federal and state research and experimentation credits		1,412			(3	)%		1,037			(2	)%
State income taxes, net of federal tax benefit		468			(1	)%		491			(1	)%
Other		827			(3	)%		136			—	%
Total	$	(204	)		—	%	$	(97	)	$	—

Schedule of Deferred Tax Assets and Liabilities [Table Text Block]

	December 31,			December 31,
	2023			2022
Deferred tax assets:
Federal and state net operating losses	$	77,201		$	74,270
Federal and state research and experimentation credits		12,406			10,869
Research and experimental costs		9,458			4,837
ASC 842 - lease liabilities		1,468			1,508
Stock based compensation		1,474			482
Fixed asset differences		185			87
Goodwill		—			36
Accrued compensation		610			69
Other		59			43
Total gross deferred tax assets		102,861			92,201
Less valuation allowance		(95,256	)		(83,000	)
Net deferred tax assets	$	7,605		$	9,201
Deferred tax liabilities:
Patent expenditures	$	(1,096	)	$	(1,464	)
ASC 842 - right of use assets		(897	)		(1,049	)
Fixed asset differences		(9	)		(28	)
Intangible asset differences		(5,603	)		(6,644	)
Total gross deferred tax liabilities	$	(7,605	)	$	(9,185	)
Total net deferred tax assets and liabilities	$	—		$	16

Summary of Income Tax Contingencies [Table Text Block]

	Year Ended December 31,
	2023			2022
Beginning balance	$	1,046		$	918
Addition for current year tax positions		94			98
Addition for prior year tax positions		—			30
Reduction for prior year positions		(77	)		—
Reduction for prior year positions resolved during the current year		—			—
Ending balance	$	1,063		$	1,046