Note 1 - Description of Business (Details Textual)	Dec. 31, 2020 a
Area of Land (Acre)	45,000
California, Cadiz Valley [Member]
Area of Land (Acre)	35,000
California, Danby Dry Lake [Member]
Area of Land (Acre)	2,000
California, Piute Valley [Member]
Area of Land (Acre)	9,000