Note 12 - Leasing Arrangements - Rental Income under Operating Leases (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Minimum rentals	$ 742	$ 712	$ 1,482	$ 1,410
Percentage rentals	417	37	534	304
Licensing fees	165	111	290	345
Other	315	321	863	608
Total	$ 1,639	$ 1,181	$ 3,169	$ 2,667