Note 6 - Acquisitions - Proforma Revenue and Earnings (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 29, 2018	Dec. 30, 2017
Revenues	$ 200,352	$ 186,737
Operating income	$ 5,415	$ 280
Diluted net income per share (in dollars per share)	$ 0.22	$ 0.17
TKE [Member]
Revenues	$ 205,732	$ 193,956
Operating income	$ 6,333	$ 1,668
Diluted net income per share (in dollars per share)	$ 0.26	$ 0.23