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Note 10 - Income Taxes - Components of Income Tax Expense Benefit (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Jan. 01, 2023	Jan. 02, 2022
Income (loss) before income taxes	$ (261)	$ (4,169)	$ (6,497)
State	9	3	3
Foreign	(6)	36	22
Subtotal	3	39	25
Foreign	(1)	59	94
Subtotal	(1)	59	94
Provision for income taxes	2	98	119
Domestic Tax Authority [Member]
U.S.	(225)	(4,116)	(6,461)
Foreign Tax Authority [Member]
Foreign	$ (36)	$ (53)	$ (36)

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