v3.26.1
Note 3 - Reportable Segments - Assets by Operating Segment (Details) - USD ($)
$ in Thousands
Dec. 31, 2025
Dec. 31, 2024
Assets $ 140,914 $ 134,494
Water and Land Resources [Member]    
Assets 130,900 123,786
Water Filtration Technology [Member]    
Assets $ 10,014 $ 10,708