Note 5 - Property, Equipment, Assets Held for Sale, Operating Leases, and Sale-leaseback Transactions - Rental Income Under Noncancelable Sublease Agreements (Details) - Franchisees [Member] $ in Thousands	Jun. 06, 2017 USD ($)
2018	$ 382
2019	285
2020	285
2021	291
2022	300
Subsequent years	1,019
Total minimum sub-lease payments	$ 2,562