Note 18 - Commitments (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2018
Operating Lease, Right-of-Use Asset	$ 5,820
Operating Lease, Liability, Total	6,055
Sublease Income	$ 8	78
Operating Leases, Rent Expense, Total		$ 2,777
Accounting Standards Update 2016-02 [Member]
Operating Lease, Right-of-Use Asset			$ 3,900
Operating Lease, Liability, Total			$ 4,100