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SEGMENT REPORTING - Assets (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended	12 Months Ended
	Jun. 30, 2025	Jun. 30, 2025	Dec. 31, 2024
SEGMENT REPORTING
Consolidated total assets	$ 150,498	$ 150,498	$ 146,357
Corporate And Other
SEGMENT REPORTING
Consolidated total assets	7,564	7,564	4,887
Battery-grade graphite business
SEGMENT REPORTING
Expenditures for battery-grade graphite business segment assets	2,200	5,057	6,138
Battery-grade graphite business | Operating Segment
SEGMENT REPORTING
Consolidated total assets	$ 142,934	$ 142,934	$ 141,470

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