Note 11 - Income Taxes (Details Textual) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 03, 2021	Jun. 27, 2020	Jul. 03, 2021	Jun. 27, 2020	Jan. 02, 2021
Income Tax Expense (Benefit), Total	$ 641	$ 845	$ 1,597	$ 1,289
Other Noncurrent Liabilities [Member]
Liability for Uncertainty in Income Taxes, Noncurrent	21,900		$ 21,900		$ 22,300
Domestic Tax Authority [Member]
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent			21.00%
Foreign Tax Authority [Member]
Deferred Tax Assets, Valuation Allowance, Total	$ 0		$ 0