Note 14 - Segment Information - Total Assets by Geographic Area (Details) - USD ($) $ in Thousands	Jan. 02, 2021	Dec. 28, 2019
Total assets	$ 68,339	$ 96,173
UNITED STATES
Total assets	56,308	82,110
CANADA
Total assets	7,067	9,638
PUERTO RICO
Total assets	1,483	1,103
SERBIA
Total assets	$ 3,481	$ 3,322