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SEGMENT REPORTING - Assets (Details) - USD ($)
$ in Thousands
Sep. 30, 2025
Dec. 31, 2024
Segment Reporting Information [Line Items]    
Total parent assets $ 126,544 $ 150,033
Total assets 768,871 756,394
Long-lived tangible assets 211,065 215,545
Asia Pacific    
Segment Reporting Information [Line Items]    
Long-lived tangible assets 2,314 3,498
Intellectual property operations    
Segment Reporting Information [Line Items]    
Total assets 250,813 213,854
Long-lived tangible assets 97 126
Intellectual property operations | Asia Pacific    
Segment Reporting Information [Line Items]    
Long-lived tangible assets 0 0
Industrial operations    
Segment Reporting Information [Line Items]    
Total assets 50,876 48,438
Long-lived tangible assets 944 1,244
Industrial operations | Asia Pacific    
Segment Reporting Information [Line Items]    
Long-lived tangible assets 0 925
Energy operations    
Segment Reporting Information [Line Items]    
Total assets 207,206 209,355
Long-lived tangible assets 190,151 192,435
Energy operations | Asia Pacific    
Segment Reporting Information [Line Items]    
Long-lived tangible assets 0 0
Manufacturing Operations    
Segment Reporting Information [Line Items]    
Total assets 133,432 134,714
Long-lived tangible assets 19,873 21,740
Manufacturing Operations | Asia Pacific    
Segment Reporting Information [Line Items]    
Long-lived tangible assets $ 2,314 $ 2,573