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SEGMENT REPORTING - Profit or Loss And Significant Segment Expenses (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
SEGMENT REPORTING    
Other (expense) income $ (41) $ 95
Product development income (expenses) (182) (315)
Exploration expenses (7) (11)
General and administrative expenses (2,294) (2,605)
Depreciation and amortization (152) (62)
Net Loss (2,676) (2,898)
Corporate And Other    
SEGMENT REPORTING    
Other (expense) income 43 90
General and administrative expenses (1,818) (1,986)
Depreciation and amortization (1) (1)
Net Loss (1,776) (1,897)
Battery-grade graphite business | Operating Segment    
SEGMENT REPORTING    
Other (expense) income (84) 5
Product development income (expenses) (182) (315)
Exploration expenses (7) (11)
General and administrative expenses (476) (619)
Depreciation and amortization (151) (61)
Net Loss $ (900) $ (1,001)