Note 17 - Leases - Balance Sheet Information (Details) - USD ($) $ in Thousands	Sep. 26, 2020	Dec. 28, 2019
Operating lease right of use assets	$ 4,686	$ 5,820
Operating right of use liability - current	(1,984)	(2,134)
Operating right of use liability - non-current	(2,922)	(3,921)
Total operating lease liabilities	(4,906)	(6,055)
Property and equipment - (ROU assets)	1,140	985
Accumulated depreciation	(655)	(475)
Property and equipment, net	485	510
Finance lease liability - current	(311)	(315)
Finance lease liability - non-current	(115)	(189)
Total finance lease liabilities	$ (426)	$ (504)
Operating leases (in years) (Year)	1 year 229 days	2 years 197 days
Finance leases (in years) (Year)	1 year 204 days	1 year 226 days
Operating leases	4.24%	4.11%
Finance leases	2.47%	1.78%