SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Disaggregation of Revenue [Line Items]
Total revenues	$ 59,223	$ 88,047
Intellectual property operations
Disaggregation of Revenue [Line Items]
Total revenues	19,508	76,043
Paid-up license revenue agreements
Disaggregation of Revenue [Line Items]
Total revenues	17,788	73,585
Recurring License Revenue Agreements
Disaggregation of Revenue [Line Items]
Total revenues	1,720	2,458
Industrial operations
Disaggregation of Revenue [Line Items]
Total revenues	39,715	12,004
Printers, consumables and parts
Disaggregation of Revenue [Line Items]
Total revenues	35,432	10,934
Services
Disaggregation of Revenue [Line Items]
Total revenues	$ 4,283	$ 1,070