Note 10 - Income Taxes - Unrecognized Tax Benefits Roll Forward (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Jan. 01, 2023	Jan. 02, 2022
Beginning balance of unrecognized tax benefits	$ 2,249	$ 2,118	$ 2,175
Additions (subtractions) for tax positions related to the prior year	(2)
Additions (subtractions) for tax positions related to the prior year		0	(7)
Additions for tax positions related to the current year	262	185	128
Lapse of statutes of limitations	0	(54)	(178)
Ending balance of unrecognized tax benefits	$ 2,513	$ 2,249	$ 2,118