Note 9 - Income Taxes - Components of Income Tax Expense Benefit (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 01, 2023	Jan. 02, 2022	Jan. 03, 2021
Loss before income taxes	$ (4,169)	$ (6,497)	$ (11,100)
State	3	3	3
Foreign	36	22	39
Subtotal	39	25	42
Foreign	59	94	9
Subtotal	59	94	9
Provision for income taxes	98	119	51
Domestic Tax Authority [Member]
U.S.	(4,116)	(6,461)	(11,170)
Foreign Tax Authority [Member]
Foreign	$ (53)	$ (36)	$ 70