SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Disaggregation of Revenue [Line Items]
Total revenues	$ 15,878	$ 1,582	$ 46,102	$ 24,785
Intellectual property operations
Disaggregation of Revenue [Line Items]
Total revenues	6,320	1,582	16,997	24,785
Paid-up license revenue agreements
Disaggregation of Revenue [Line Items]
Total revenues	6,000	1,100	15,553	23,110
Recurring License Revenue Agreements
Disaggregation of Revenue [Line Items]
Total revenues	320	482	1,444	1,675
Industrial operations
Disaggregation of Revenue [Line Items]
Total revenues	9,558	$ 0	29,105	$ 0
Printers, consumables and parts
Disaggregation of Revenue [Line Items]
Total revenues	8,509		26,023
Services
Disaggregation of Revenue [Line Items]
Total revenues	$ 1,049		$ 3,082