Note 4 - Leases (Details Textual) $ in Millions	Dec. 25, 2021 USD ($)
Lessee, Operating Lease, Lease Not yet Commenced, Minimum Lease Payments	$ 9.9
Minimum [Member]
Lessee, Operating Lease, Remaining Lease Term (Year)	1 year
Maximum [Member]
Lessee, Operating Lease, Remaining Lease Term (Year)	6 years