Note 2 - Reportable Segments - Property, Plant, Equipment and Water Programs (Details) - USD ($) $ in Thousands	Jun. 30, 2026	Dec. 31, 2025
Property, plant, and equipment	$ 109,655	$ 107,213
Less accumulated depreciation	(12,591)	(11,829)
Property, plant, and equipment, net	97,064	95,384
Water and Land Resources [Member]
Property, plant, and equipment	108,961	106,733
Less accumulated depreciation	(12,369)	(11,625)
Property, plant, and equipment, net	96,592	95,108
Water Treatment [Member]
Property, plant, and equipment	694	480
Less accumulated depreciation	(222)	(204)
Property, plant, and equipment, net	472	276
Land and Land Improvements [Member]
Property, plant, and equipment	39,211	39,211
Land and Land Improvements [Member] \| Water and Land Resources [Member]
Property, plant, and equipment	39,211	39,211
Land and Land Improvements [Member] \| Water Treatment [Member]
Property, plant, and equipment	0	0
Water Programs [Member]
Property, plant, and equipment	32,457	32,023
Water Programs [Member] \| Water and Land Resources [Member]
Property, plant, and equipment	32,457	32,023
Water Programs [Member] \| Water Treatment [Member]
Property, plant, and equipment	0	0
Pipelines [Member]
Property, plant, and equipment	22,109	22,106
Pipelines [Member] \| Water and Land Resources [Member]
Property, plant, and equipment	22,109	22,106
Pipelines [Member] \| Water Treatment [Member]
Property, plant, and equipment	0	0
Building [Member]
Property, plant, and equipment	1,837	1,805
Building [Member] \| Water and Land Resources [Member]
Property, plant, and equipment	1,837	1,805
Building [Member] \| Water Treatment [Member]
Property, plant, and equipment	0	0
Leasehold Improvements, Furniture, Fixtures [Member]
Property, plant, and equipment	1,624	1,623
Leasehold Improvements, Furniture, Fixtures [Member] \| Water and Land Resources [Member]
Property, plant, and equipment	1,616	1,616
Leasehold Improvements, Furniture, Fixtures [Member] \| Water Treatment [Member]
Property, plant, and equipment	8	7
Machinery and Equipment [Member]
Property, plant, and equipment	4,589	4,427
Machinery and Equipment [Member] \| Water and Land Resources [Member]
Property, plant, and equipment	4,076	4,032
Machinery and Equipment [Member] \| Water Treatment [Member]
Property, plant, and equipment	513	395
Construction in Progress [Member]
Property, plant, and equipment	7,828	6,018
Construction in Progress [Member] \| Water and Land Resources [Member]
Property, plant, and equipment	7,655	5,940
Construction in Progress [Member] \| Water Treatment [Member]
Property, plant, and equipment	$ 173	$ 78