Note 11 - Income Taxes (Details Textual) - USD ($) $ in Thousands	3 Months Ended
	Apr. 03, 2021	Mar. 28, 2020	Jan. 02, 2020
Income Tax Expense (Benefit), Total	$ 956	$ 444
Other Noncurrent Liabilities [Member]
Liability for Uncertainty in Income Taxes, Noncurrent	$ 22,300		$ 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