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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Intellectual Property Operations (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]
Inventor royalties	$ 732		$ 1,092
Contingent legal fees	1,010		2,314
Litigation and licensing expenses	939		3,272
Amortization of patents	2,601		7,802
Total cost of revenues	9,930		27,912
Intellectual property operations
Disaggregation of Revenue [Line Items]
Inventor royalties	732	$ 280	1,092	$ 823
Contingent legal fees	1,010	285	2,314	5,735
Litigation and licensing expenses	939	782	3,272	4,881
Amortization of patents	2,601	2,612	7,802	7,086
Total cost of revenues	$ 5,282	$ 3,959	$ 14,480	$ 18,525

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