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SEGMENT REPORTING - Revenue by Geographical Area (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2023 | Sep. 30, 2022
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |
Revenues | $ 10,084 | $ 15,878 | $ 32,791 | $ 46,102
Intellectual property operations |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |
Revenues | 1,760 | 6,320 | 6,330 | 16,997
Industrial operations |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |
Revenues | 8,324 | 9,558 | 26,461 | 29,105
Americas |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |
Revenues | 5,472 | 10,525 | 15,103 | 29,029
Americas | Intellectual property operations |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |
Revenues | 1,758 | 6,312 | 3,325 | 16,383
Americas | Industrial operations |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |
Revenues | 3,714 | 4,213 | 11,778 | 12,646
United States |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |
Revenues | 5,232 | 10,307 | 13,802 | 28,249
United States | Intellectual property operations |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |
Revenues | 1,756 | 6,311 | 2,815 | 16,372
United States | Industrial operations |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |
Revenues | 3,476 | 3,996 | 10,987 | 11,877
Canada and Latin America |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |
Revenues | 240 | 218 | 1,301 | 780
Canada and Latin America | Intellectual property operations |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |
Revenues | 2 | 1 | 510 | 11
Canada and Latin America | Industrial operations |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |
Revenues | 238 | 217 | 791 | 769
Europe, Middle East and Africa |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |
Revenues | 1,840 | 2,282 | 6,767 | 7,677
Europe, Middle East and Africa | Intellectual property operations |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |
Revenues | 0 | 0 | 0 | 589
Europe, Middle East and Africa | Industrial operations |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |
Revenues | 1,840 | 2,282 | 6,767 | 7,088
Asia Pacific |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |
Revenues | 2,772 | 3,071 | 10,921 | 9,396
Asia Pacific | Intellectual property operations |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |
Revenues | 2 | 8 | 3,005 | 25
Asia Pacific | Industrial operations |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |
Revenues | 2,770 | 3,063 | 7,916 | 9,371
China |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |
Revenues | 793 | 1,403 | 5,408 | 3,627
China | Intellectual property operations |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |
Revenues | 0 | 0 | 3,000 | 0
China | Industrial operations |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |
Revenues | 793 | 1,403 | 2,408 | 3,627
India |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |
Revenues | 1,024 | 582 | 2,022 | 2,563
India | Intellectual property operations |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |
Revenues | 0 | 0 | 0 | 0
India | Industrial operations |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |
Revenues | 1,024 | 582 | 2,022 | 2,563
Asia-Pacific, excluding China and India |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |
Revenues | 955 | 1,086 | 3,491 | 3,206
Asia-Pacific, excluding China and India | Intellectual property operations |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |
Revenues | 2 | 8 | 5 | 25
Asia-Pacific, excluding China and India | Industrial operations |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |
Revenues | $ 953 | $ 1,078 | $ 3,486 | $ 3,181

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