v3.26.1
SEGMENT REPORTING - Assets (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Dec. 31, 2025
SEGMENT REPORTING      
Consolidated total assets $ 189,134   $ 194,533
Corporate And Other      
SEGMENT REPORTING      
Consolidated total assets 42,426   48,972
Battery-grade graphite business      
SEGMENT REPORTING      
Expenditures for battery-grade graphite business segment assets 1,600 $ 2,900  
Battery-grade graphite business | Operating Segment      
SEGMENT REPORTING      
Consolidated total assets $ 146,708   $ 145,561