Note 3 - Property, Plant, Equipment and Water Programs - Property, Plant, Equipment and Water Programs (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Property, plant, and equipment	$ 56,640	$ 53,047
Less accumulated depreciation	(6,693)	(6,428)
Property, plant, and equipment, net	49,947	46,619
Land and Land Improvements [Member]
Property, plant, and equipment	25,064	25,064
Water Programs [Member]
Property, plant, and equipment	27,127	23,812
Building [Member]
Property, plant, and equipment	1,576	1,572
Leasehold Improvements [Member]
Property, plant, and equipment	570	570
Furniture and Fixtures [Member]
Property, plant, and equipment	461	461
Machinery and Equipment [Member]
Property, plant, and equipment	1,543	1,422
Construction in Progress [Member]
Property, plant, and equipment	$ 299	$ 146

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

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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.

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