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Note 2 - Reportable Segments - Property, Plant, Equipment and Water Programs (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024
Property, plant, and equipment	$ 105,151	$ 98,940
Less accumulated depreciation	(11,476)	(10,578)
Property, plant, and equipment, net	93,675	88,362
Water and Land Resources [Member]
Property, plant, and equipment	104,702	98,683
Less accumulated depreciation	(11,280)	(10,397)
Property, plant, and equipment, net	93,422	88,286
Water Treatment [Member]
Property, plant, and equipment	449	257
Less accumulated depreciation	(196)	(181)
Property, plant, and equipment, net	253	76
Land and Land Improvements [Member]
Property, plant, and equipment	33,089	33,069
Land and Land Improvements [Member] | Water and Land Resources [Member]
Property, plant, and equipment	33,089	33,069
Land and Land Improvements [Member] | Water Treatment [Member]
Property, plant, and equipment	0	0
Water Programs [Member]
Property, plant, and equipment	31,544	29,383
Water Programs [Member] | Water and Land Resources [Member]
Property, plant, and equipment	31,544	29,383
Water Programs [Member] | Water Treatment [Member]
Property, plant, and equipment	0	0
Pipelines [Member]
Property, plant, and equipment	22,104	22,100
Pipelines [Member] | Water and Land Resources [Member]
Property, plant, and equipment	22,104	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	1,624	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	8	4
Machinery and Equipment [Member]
Property, plant, and equipment	4,426	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	394	247
Construction in Progress [Member]
Property, plant, and equipment	10,559	6,857
Construction in Progress [Member] | Water and Land Resources [Member]
Property, plant, and equipment	10,512	6,851
Construction in Progress [Member] | Water Treatment [Member]
Property, plant, and equipment	$ 47	$ 6

X

- Definition

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(8)(b))
-Publisher FASB
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X

- Definition

Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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-Section S99
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+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 842
-SubTopic 20
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-Paragraph 7A
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-Topic 852
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
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