Note 6 - Acquisitions - Maximum Deferred Consideration Payments (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 29, 2018	Dec. 30, 2017
December 28, 2019	$ 1,588
January 2, 2021	1,461
January 1, 2022	1,724
Estimated future contingent consideration payments	4,773
Balance	2,091	$ 1,231
Contingent consideration paid	(300)	(1,694)
Estimated contingent payments, acquisitions	2,935	1,773
Increase to contingent payment estimates		781
Balance	4,773	$ 2,091
Other changes in contingent consideration	$ 47