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DISCONTINUED OPERATIONS - Summary of Significant Operating, Investing, and Financing Cash Flow Information (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended 12 Months Ended
Feb. 28, 2025
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Dec. 31, 2024
Operating activities:            
Depreciation and amortization   $ 0 $ 708 $ 0 $ 2,191  
Gain on the sale of divested business   0 0 (9,657) 0 $ 74,900
Total       (9,657) 2,191  
Investing activities:            
Proceeds from the sale of Terphane $ 9,800     9,835 0  
Discontinued operations   $ 0 $ 948 0 2,108  
Total       $ 9,835 $ 2,108