SEGMENT REPORTING - Long-lived Assets by Geographic Area (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived tangible assets	$ 3,275	$ 3,537
Intellectual property operations
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived tangible assets	290	324
Industrial operations
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived tangible assets	2,985	3,213
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived tangible assets	545	626
United States | Intellectual property operations
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived tangible assets	290	324
United States | Industrial operations
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived tangible assets	255	302
Malaysia
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived tangible assets	2,543	2,703
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	2,543	2,703
Other foreign countries
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived tangible assets	187	208
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	$ 187	$ 208