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Note 6 - Assets Held for Sale (Details Textual) | Mar. 31, 2022 USD ($) a | Feb. 01, 2022 USD ($) a | Dec. 31, 2021 USD ($) a
--- | --- | --- | ---
Kapalua Central Resort Project [Member] |  |  |
Receivables, Long-term Contracts or Programs, Total |  |  | $ 40,000,000.0
Kapalua Central Resort Project [Member] | Deposits held in Escrow for Properties Held for Sale [Member] |  |  |
Restricted Cash and Cash Equivalents, Total | $ 300,000 |  |
630-Acre Parcel Of Agricultural Land [Member] | Upcountry Maui [Member] |  |  |
Receivables, Long-term Contracts or Programs, Total |  | $ 9,700,000 |
Area of Real Estate Property (Acre) | a | 646 | 646 | 646
630-Acre Parcel Of Agricultural Land [Member] | Deposits held in Escrow for Properties Held for Sale [Member] | Upcountry Maui [Member] |  |  |
Restricted Cash and Cash Equivalents, Total | $ 2,000,000.0 |  |

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