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SEGMENT REPORTING - Long-lived Assets by Geographic Area (Details) - USD ($)
$ in Thousands
Jun. 30, 2022
Dec. 31, 2021
Revenues from External Customers and Long-Lived Assets [Line Items]    
Long-lived tangible assets $ 3,883 $ 4,183
Intellectual property operations    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Long-lived tangible assets 261 204
Industrial operations    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Long-lived tangible assets 3,622 3,979
United States    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Long-lived tangible assets 631 677
United States | Intellectual property operations    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Long-lived tangible assets 261 204
United States | Industrial operations    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Long-lived tangible assets 370 473
Malaysia    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Long-lived tangible assets 2,989 3,203
Malaysia | Intellectual property operations    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Long-lived tangible assets 0 0
Malaysia | Industrial operations    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Long-lived tangible assets 2,989 3,203
Other foreign countries    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Long-lived tangible assets 263 303
Other foreign countries | Intellectual property operations    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Long-lived tangible assets 0 0
Other foreign countries | Industrial operations    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Long-lived tangible assets $ 263 $ 303