Note 3 - Property, Plant, Equipment and Water Programs - Property, Plant, Equipment and Water Programs (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Property, plant, and equipment	$ 53,047	$ 51,439
Less accumulated depreciation	(6,428)	(6,170)
Property, plant, and equipment, net	46,619	45,269
Land and Land Improvements [Member]
Property, plant, and equipment	25,064	24,781
Water Programs [Member]
Property, plant, and equipment	23,812	22,595
Building [Member]
Property, plant, and equipment	1,572	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	1,422	1,337
Construction in Progress [Member]
Property, plant, and equipment	$ 146	$ 123

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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