Note 2 - Assets Held for Sale - Assets Held for Sale (Details) (Parentheticals) - a	Dec. 31, 2019	Mar. 31, 2019	Dec. 31, 2018
Kapalua Central Resort Project [Member] | Kapalua Resort [Member]
Area of real estate (Acre)	46
630-Acre Parcel Of Agricultural Land [Member]
Area of real estate (Acre)	630		630
Agricultural Land and Wastewater Treatment Facility [Member] | Upcountry Maui [Member]
Area of real estate (Acre)		33	33