Note 2 - Other Relevant Accounting Polices (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 29, 2024	Dec. 31, 2023	Jan. 01, 2023
Contract with Customer, Asset, after Allowance for Credit Loss, Current	$ 2,682	$ 3,609
Current Expected Credit Losses (CECL)		0	$ 0
Accounts Receivable, Allowance for Credit Loss	30	34
Accounts Receivable, Credit Loss Expense (Reversal)	6	24	$ 16
Operating Lease, Right-of-Use Asset	758	981
Operating Lease, Liability	731	983
Equity Securities without Readily Determinable Fair Value, Amount	300	300
Goodwill, Impairment Loss	$ 0	$ 0
Operating Expenses, Denominated in Foreign Currency, Percent	6.00%	8.00%	12.00%
Marketing and Advertising Expense	$ 73	$ 44	$ 40
Defined Contribution Plan, Cost	100
Unconsolidated Variable Interest Entity [Member]
Equity Method Investments	300
Financing Receivable, after Allowance for Credit Loss	1,300
Professional Services [Member]
Contract with Customer, Asset, after Allowance for Credit Loss, Current	400	1,100	300
Research And Development Associated With Revenue Contract Performance [Member]
Research and Development Expenses Reclassified to Cost of Goods Sold	4,800	3,000	3,300
Accounts Receivable [Member] | Professional Services [Member]
Contract with Customer, Asset, after Allowance for Credit Loss, Current	$ 2,700	$ 3,600	$ 2,000