Note 3 - Reportable Segments - Property, Plant, Equipment and Water Programs (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
Property, plant, and equipment	$ 107,213	$ 98,940
Less accumulated depreciation	(11,829)	(10,578)
Property, plant, and equipment, net	95,384	88,362
Water and Land Resources [Member]
Property, plant, and equipment	106,733	98,683
Less accumulated depreciation	(11,625)	(10,397)
Property, plant, and equipment, net	95,108	88,286
Water Treatment [Member]
Property, plant, and equipment	480	257
Less accumulated depreciation	(204)	(181)
Property, plant, and equipment, net	276	76
Land and Land Improvements [Member]
Property, plant, and equipment	39,211	33,069
Land and Land Improvements [Member] \| Water and Land Resources [Member]
Property, plant, and equipment	39,211	33,069
Land and Land Improvements [Member] \| Water Treatment [Member]
Property, plant, and equipment	0	0
Water Programs [Member]
Property, plant, and equipment	32,023	29,383
Water Programs [Member] \| Water and Land Resources [Member]
Property, plant, and equipment	32,023	29,383
Water Programs [Member] \| Water Treatment [Member]
Property, plant, and equipment	0	0
Pipelines [Member]
Property, plant, and equipment	22,106	22,100
Pipelines [Member] \| Water and Land Resources [Member]
Property, plant, and equipment	22,106	22,100
Pipelines [Member] \| Water Treatment [Member]
Property, plant, and equipment	0	0
Building [Member]
Property, plant, and equipment	1,805	1,805
Building [Member] \| Water and Land Resources [Member]
Property, plant, and equipment	1,805	1,805
Building [Member] \| Water Treatment [Member]
Property, plant, and equipment	0	0
Leasehold Improvements, Furniture, Fixtures [Member]
Property, plant, and equipment	1,623	1,609
Leasehold Improvements, Furniture, Fixtures [Member] \| Water and Land Resources [Member]
Property, plant, and equipment	1,616	1,605
Leasehold Improvements, Furniture, Fixtures [Member] \| Water Treatment [Member]
Property, plant, and equipment	7	4
Machinery and Equipment [Member]
Property, plant, and equipment	4,427	4,117
Machinery and Equipment [Member] \| Water and Land Resources [Member]
Property, plant, and equipment	4,032	3,870
Machinery and Equipment [Member] \| Water Treatment [Member]
Property, plant, and equipment	395	247
Construction in Progress [Member]
Property, plant, and equipment	6,018	6,857
Construction in Progress [Member] \| Water and Land Resources [Member]
Property, plant, and equipment	5,940	6,851
Construction in Progress [Member] \| Water Treatment [Member]
Property, plant, and equipment	$ 78	$ 6