Note 10 - Leasing Arrangements - Rental Income under Operating Leases (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Total	$ 3,219	$ 2,216
Operating Lease Income Including Water System Sales [Member]
Minimum rentals	1,315	964
Percentage rentals	596	605
Licensing fees	33	33
Other	294	267
Total	$ 2,238	$ 1,869