v3.26.1
Note 2 - Reportable Segments - Assets by Operating Segment (Details) - USD ($)
$ in Thousands
Jun. 30, 2026
Dec. 31, 2025
Assets $ 134,763 $ 140,914
Water and Land Resources [Member]    
Assets 126,887 130,900
Water Treatment [Member]    
Assets $ 7,876 $ 10,014