Note 10 - Income Taxes (Tables)

12 Months Ended

Dec. 29, 2024

Notes Tables

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

	Fiscal Years
	2024			2023			2022
Income (loss) before income taxes:
U.S.	$	(3,782	)	$	(225	)	$	(4,116	)
Foreign		(56	)		(36	)		(53	)
Income (loss) before income taxes	$	(3,838	)	$	(261	)	$	(4,169	)
Provision for income taxes:
Current:
Federal	$	—		$	—		$	—
State		(2	)		9			3
Foreign		(20	)		(6	)		36
Subtotal		(22	)		3			39
Deferred:
Federal	$	—		$	—		$	—
State		—			—			—
Foreign		25			(1	)		59
Subtotal		25			(1	)		59
Provision for income taxes	$	3		$	2		$	98

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

	Fiscal Years
	2024					2023					2022
Income tax benefit at statutory rate	$	(806	)	21.0	%	$	(55	)	21.0	%	$	(876	)	21.0	%
State taxes		(2	)	0.1	%		9		-3.4	%		3		-0.1	%
Foreign taxes		17		-0.4	%		—		-0.1	%		106		-2.5	%
Stock compensation and other permanent differences		8		-0.2	%		(740	)	282.9	%		21		-0.5	%
162(m)		147		-3.8	%		—		0.0	%		—		0.0	%
R&D tax credits		(543	)	14.1	%		(480	)	183.8	%		(318	)	7.6	%
Expired tax attributes		585		-15.3	%		1,290		-493.5	%		3,563		-85.5	%
Future benefit of deferred tax assets not recognized		597		-15.6	%		(22	)	8.6	%		(2,401	)	57.6	%
Provision for income taxes	$	3		-0.1	%	$	2		-0.7	%	$	98		-2.4	%

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

	December 29, 2024			December 31, 2023
Deferred tax assets:
Net operating losses	$	42,488		$	42,220
Accruals and reserves		1,232			1,569
Credits carryforward		7,342			6,730
Depreciation and amortization		6,086			5,841
Stock-based compensation		601			447
Operating lease liability		165			216
Gross deferred tax assets		57,914			57,023
Deferred tax liabilities:
Right-of-use asset		(172	)		(215	)
Withholding tax on future distribution		(125	)		(125	)
Gross deferred tax liabilities		(297	)		(340	)
Net deferred tax assets		57,617			56,683
Valuation allowance		(57,742	)		(56,783	)
Total deferred tax liability	$	(125	)	$	(100	)

Schedule of Unrecognized Tax Benefits Roll Forward [Table Text Block]

	Fiscal Years
	2024			2023		2022
Beginning balance of unrecognized tax benefits	$	2,513		$	2,249	$	2,118
Additions (subtractions) for tax positions related to the prior year		(63	)		2		—
Additions for tax positions related to the current year		280			262		185
Lapse of statutes of limitations		—			—		(54	)
Ending balance of unrecognized tax benefits	$	2,730		$	2,513	$	2,249

Schedule of Income Taxes Paid [Table Text Block]

	Fiscal Years
	2024		2023		2022
Federal	$	—	$	—	$	—
State and local		13		9		2
Japan		1		2		2
Taiwan		—		2		4
India		15		1		7
China		4		—		—
Other foreign jurisdictions		—		—		1
Total income taxes paid	$	33	$	14	$	16