SEGMENT REPORTING - Revenue by Geographical Area (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 14,803	$ 13,507
Intellectual property operations
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	4,176	2,615
Industrial operations
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	10,627	10,892
Americas
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	5,627	6,324
Americas | Intellectual property operations
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	1,174	2,103
Americas | Industrial operations
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	4,453	4,221
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	4,907	5,946
United States | Intellectual property operations
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	673	2,097
United States | Industrial operations
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	4,234	3,849
Canada and Latin America
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	720	378
Canada and Latin America | Intellectual property operations
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	501	6
Canada and Latin America | Industrial operations
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	219	372
Europe, Middle East and Africa
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	2,965	3,008
Europe, Middle East and Africa | Intellectual property operations
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	0	500
Europe, Middle East and Africa | Industrial operations
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	2,965	2,508
Asia Pacific
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	6,211	4,175
Asia Pacific | Intellectual property operations
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	3,002	12
Asia Pacific | Industrial operations
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	3,209	4,163
China
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	3,843	1,133
China | Intellectual property operations
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	3,000	0
China | Industrial operations
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	843	1,133
India
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	828	1,749
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	828	1,749
Asia-Pacific, excluding China and India
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	1,540	1,293
Asia-Pacific, excluding China and India | Intellectual property operations
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	2	12
Asia-Pacific, excluding China and India | Industrial operations
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 1,538	$ 1,281