Note 2 - Assets Held for Sale and Real Estate Sales - Assets Held for Sale (Details) (Parentheticals) - a	Dec. 31, 2018	Dec. 31, 2017
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