Note 15 - Income Taxes (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Jan. 02, 2021	Dec. 28, 2019
Effective Income Tax Rate Reconciliation, Percent, Total	26.40%	15.80%
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	21.00%	21.00%
Income Tax Expense (Benefit), Total	$ (3,188)	$ 764
Effective Income Tax Rate Reconciliation, Tax Credit, Amount, Total		668
Effective Income Tax Rate Reconciliation, NOL Adjustments and Repatriation Taxes, Amount	(53)	$ 154
Domestic Tax Authority [Member]
Operating Loss Carryforwards, Total	8,400
State and Local Jurisdiction [Member]
Operating Loss Carryforwards, Total	$ 13,600
State and Local Jurisdiction [Member] | New Jersey Division of Taxation [Member]
Income Tax Examination, Year under Examination	2009 2010 2011 2012