SEGMENT REPORTING - Revenue by Geographical Area (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 16,717	$ 17,400	$ 30,224	$ 23,203
Intellectual property operations
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	8,062		10,677
Industrial operations
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	8,655		19,547
Americas
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	12,180		18,504
Americas | Intellectual property operations
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	7,968		10,071
Americas | Industrial operations
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	4,212		8,433
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	11,996		17,942
United States | Intellectual property operations
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	7,964		10,061
United States | Industrial operations
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	4,032		7,881
Canada and Latin America
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	184		562
Canada and Latin America | Intellectual property operations
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	4		10
Canada and Latin America | Industrial operations
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	180		552
Europe, Middle East and Africa
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	2,387		5,395
Europe, Middle East and Africa | Intellectual property operations
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	89		589
Europe, Middle East and Africa | Industrial operations
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	2,298		4,806
Asia Pacific
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	2,150		6,325
Asia Pacific | Intellectual property operations
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	5		17
Asia Pacific | Industrial operations
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	2,145		6,308
China
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	1,091		2,224
China | Intellectual property operations
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	0		0
China | Industrial operations
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	1,091		2,224
India
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	232		1,981
India | Intellectual property operations
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	0		0
India | Industrial operations
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	232		1,981
Asia-Pacific, excluding China and India
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	827		2,120
Asia-Pacific, excluding China and India | Intellectual property operations
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	5		17
Asia-Pacific, excluding China and India | Industrial operations
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 822		$ 2,103