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Note 3 - Assets Held or Sale (Details Textual)
12 Months Ended
May 20, 2022
USD ($)
Dec. 31, 2022
USD ($)
a
Dec. 31, 2021
USD ($)
May 13, 2022
USD ($)
Feb. 01, 2022
USD ($)
a
Deposits Received for Sale of Property   $ 0 $ 4,203,000    
Kapalua Central Resort Project [Member]          
Receivables, Long-Term Contracts or Programs     $ 40,000,000.0    
Escrow Deposit       $ 300,000  
Kapalua Central Resort Project [Member] | Restricted to Cost Associated With Extending Sma Permit [Member]          
Restricted Cash and Cash Equivalents, Total       $ 290,000  
630-Acre Parcel Of Agricultural Land [Member] | Upcountry Maui [Member]          
Receivables, Long-Term Contracts or Programs         $ 9,600,000
Area of real estate (Acre) | a   646     646
Deposits Received for Sale of Property $ 9,200,000