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Note 2 - Assets Held for Sale - Assets Held for Sale (Details) (Parentheticals) - a | Dec. 31, 2020 | Dec. 31, 2019
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Kapalua Central Resort Project [Member] | Kapalua Resort [Member] |  |
Area of real estate (Acre) | 46 | 46
630-Acre Parcel Of Agricultural Land [Member] | Upcountry Maui [Member] |  |
Area of real estate (Acre) | 630 | 630

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- Definition Area of a real estate property. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | num:areaItemType
Balance Type: | na
Period Type: | instant

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |