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Note 10 - Leasing Arrangements - Rental Income under Operating Leases (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Total $ 9,621 $ 8,461
Operating Lease Income Including Water System Sales [Member]    
Minimum rentals 4,315 3,409
Percentage rentals 2,166 1,391
Licensing fees 169 827
Other 1,082 1,336
Total $ 7,732 $ 6,963