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Note D - Managed Property Revenues (Details Textual) - USD ($)
$ in Thousands
Jun. 30, 2024
Dec. 31, 2023
Accounts Receivable, after Allowance for Credit Loss $ 3,674 $ 2,269
Managed Property [Member]    
Accounts Receivable, after Allowance for Credit Loss 3,400  
Managed Property [Member] | Accounts Payable and Accrued Liabilities [Member]    
Deferred Revenue $ 300