Note 4 - Property (Details Textual) - Land [Member]	3 Months Ended
	Mar. 31, 2020 ft² a
Area of Land (Acre)	22,800
West Maui [Member]
Area of Land (Acre)	20,700
Area of Elevation from Sea (Square Foot) | ft²	5,700
West Maui [Member] | Kapalua Resort [Member]
Area of Land (Acre)	3,000
Area of Land Designated (Acre)	900
Upcountry Maui [Member]
Area of Land (Acre)	2,100