v3.26.1
Note 4 - Revenue and Segment Information - Capital Expenditures (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Capital expenditures $ 121 $ 29 $ 132 $ 168
Refinery Operations [Member] | Operating Segments [Member]        
Capital expenditures $ 121 $ 29 $ 132 $ 168