Note 9 - Income Taxes (Details Textual) - USD ($)	3 Months Ended			6 Months Ended
	Jul. 04, 2021	Apr. 04, 2021	Jun. 28, 2020	Jul. 04, 2021	Jun. 28, 2020	Jan. 03, 2021
Income Tax Expense (Benefit), Total	$ 5,000		$ (27,000)	$ 157,000	$ (9,000)
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	$ 0			0		$ 0
Proceeds from Notes Payable, Total				$ 0	$ 1,191,000
Paycheck Protection Program [Member]
Proceeds from Notes Payable, Total			$ 1,200,000
Potential India Restructure [Member]
Income Tax Expense (Benefit), Withholding Tax		$ 125,000