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Note 2 - Reportable Segments - Assets by Operating Segment (Details) - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024
Assets	$ 136,379	$ 134,494
Water and Land Resources [Member]
Assets	124,954	123,786
Water Filtration Technology [Member]
Assets	$ 11,425	$ 10,708

X

- Definition

Amount of asset recognized for present right to economic benefit.

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