Note 14 - Segment Information - Total Assets by Geographic Area (Details) - USD ($) $ in Thousands	Jul. 03, 2021	Jan. 02, 2021	Jun. 27, 2020
Total assets	$ 64,697	$ 68,339	$ 70,178
UNITED STATES
Total assets	54,095	56,308
CANADA
Total assets	5,626	7,067
PUERTO RICO
Total assets	1,511	1,483
SERBIA
Total assets	$ 3,465	$ 3,481