Note 14 - Segment Information - Total Assets by Geographic Area (Details) - USD ($) $ in Thousands	Apr. 03, 2021	Jan. 02, 2021	Mar. 28, 2020
Total assets	$ 77,770	$ 68,339	$ 83,951
UNITED STATES
Total assets	64,680	56,308
CANADA
Total assets	7,720	7,067
PUERTO RICO
Total assets	1,669	1,483
SERBIA
Total assets	$ 3,701	$ 3,481