Note 5 - Assets Held for Sale - Assets Held for Sale (Details) - USD ($)	Mar. 31, 2021	Dec. 31, 2020
Assets held for sale	$ 7,336,000	$ 7,440,000
Kapalua Central Resort Project [Member] | Kapalua Resort [Member]
Assets held for sale	2,978,000	2,978,000
Kapalua Water Company and Kapalua Waste Treatment Company [Member] | Kapalua Resort [Member]
Assets held for sale	4,202	4,306
630-Acre Parcel Of Agricultural Land [Member] | Upcountry Maui [Member]
Assets held for sale	$ 156,000	$ 156,000