Note 2 - Recent Accounting Pronouncements (Details Textual) - USD ($) $ in Millions	Jan. 01, 2019	Dec. 30, 2018
Minimum [Member]
Lessee, Operating Lease, Term of Contract		1 year
Minimum [Member] | Accounting Standards Update 2016-02 [Member] | Subsequent Event [Member]
Finance and Operating Leases, Right-of-Use Asset (Liability)	$ 80
Maximum [Member]
Lessee, Operating Lease, Term of Contract		12 years
Maximum [Member] | Accounting Standards Update 2016-02 [Member] | Subsequent Event [Member]
Finance and Operating Leases, Right-of-Use Asset (Liability)	$ 100