SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Disaggregation of Revenue [Line Items]
Total revenues	$ 88,047	$ 29,782
Net revenues	12,004
Paid-up license revenue agreements
Disaggregation of Revenue [Line Items]
Total revenues	73,585	28,389
Recurring License Revenue Agreements
Disaggregation of Revenue [Line Items]
Total revenues	2,458	1,393
Intellectual property operations
Disaggregation of Revenue [Line Items]
Total revenues	76,043	$ 29,782
Printers, consumables and parts
Disaggregation of Revenue [Line Items]
Net revenues	10,934
Services
Disaggregation of Revenue [Line Items]
Net revenues	$ 1,070