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Note 2 - Reportable Segments - Property, Plant, Equipment and Water Programs (Details) - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024
Property, plant, and equipment	$ 102,981	$ 98,940
Less accumulated depreciation	(10,876)	(10,578)
Property, plant, and equipment, net	92,105	88,362
Water and Land Resources [Member]
Property, plant, and equipment	102,720	98,683
Less accumulated depreciation	(10,691)	(10,397)
Property, plant, and equipment, net	92,029	88,286
Water Treatment [Member]
Property, plant, and equipment	261	257
Less accumulated depreciation	(185)	(181)
Property, plant, and equipment, net	76	76
Land and Land Improvements [Member]
Property, plant, and equipment	33,069	33,069
Land and Land Improvements [Member] | Water and Land Resources [Member]
Property, plant, and equipment	33,069	33,069
Land and Land Improvements [Member] | Water Treatment [Member]
Property, plant, and equipment	0	0
Water Programs [Member]
Property, plant, and equipment	30,955	29,383
Water Programs [Member] | Water and Land Resources [Member]
Property, plant, and equipment	30,955	29,383
Water Programs [Member] | Water Treatment [Member]
Property, plant, and equipment	0	0
Pipelines [Member]
Property, plant, and equipment	22,102	22,100
Pipelines [Member] | Water and Land Resources [Member]
Property, plant, and equipment	22,102	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	1,613	1,609
Leasehold Improvements, Furniture, Fixtures [Member] | Water and Land Resources [Member]
Property, plant, and equipment	1,605	1,605
Leasehold Improvements, Furniture, Fixtures [Member] | Water Treatment [Member]
Property, plant, and equipment	8	4
Machinery and Equipment [Member]
Property, plant, and equipment	4,154	4,117
Machinery and Equipment [Member] | Water and Land Resources [Member]
Property, plant, and equipment	3,907	3,870
Machinery and Equipment [Member] | Water Treatment [Member]
Property, plant, and equipment	247	247
Construction in Progress [Member]
Property, plant, and equipment	9,283	6,857
Construction in Progress [Member] | Water and Land Resources [Member]
Property, plant, and equipment	9,277	6,851
Construction in Progress [Member] | Water Treatment [Member]
Property, plant, and equipment	$ 6	$ 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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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482099/360-10-50-1

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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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-SubTopic 210
-Name Accounting Standards Codification
-Section S99
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-Subparagraph (SX 210.7-03(a)(8))
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-URI https://asc.fasb.org/1943274/2147478777/944-210-S99-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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X

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+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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-Section 50
-Paragraph 1
-SubTopic 10
-Topic 360
-Publisher FASB
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 842
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 7A
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478964/842-20-50-7A

Reference 3: http://www.xbrl.org/2003/role/exampleRef
-Topic 852
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 10
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481372/852-10-55-10

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