Note 5 - Assets Held for Sale and Real Estate Sales (Details Textual) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Real Estate Held-for-sale	$ 156	$ 212
Agricultural Land and Wastewater Treatment Facility [Member] \| Upcountry Maui [Member]
Real Estate Held-for-sale	$ 0	$ 56

Carrying amount as of the balance sheet date of investments in land and buildings held for sale, excluding real estate considered to be inventory of the entity.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03.1(f))
-URI http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910

Name:	us-gaap_RealEstateHeldforsale
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant