Note 12 - Discontinued Operations (Details Textual) - USD ($) $ in Thousands	1 Months Ended	12 Months Ended
May 31, 2021	Dec. 31, 2022	Dec. 31, 2021
Deposits Received for Sale of Property		$ 0	$ 4,203
PUC-regulated Assets of Kapalua Water Company, Ltd and Kapalua Waste Treatment Company, Ltd [Member]
Deposits Received for Sale of Property	$ 4,200

The cash inflow from the sale of property, plant and equipment (capital expenditures), software, and other intangible assets.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 12
-Subparagraph (c)
-URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3179-108585

Name:	us-gaap_ProceedsFromSaleOfProductiveAssets
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration