SEGMENT REPORTING - Segment Income and Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Revenues:
Revenues	$ 59,223	$ 88,047
Cost of revenues:
Inventor royalties	1,212	1,142
Contingent legal fees	2,444	12,074
Litigation and licensing expenses	3,970	5,462
Amortization of patents	10,403	9,851
Cost of sales	19,359	7,407
Total cost of revenues	37,388	36,098
Segment gross profit	21,835	51,949
Other operating expenses:
Engineering and development expenses - industrial operations	626	200
Sales and marketing expenses - industrial operations	8,621	1,538
Amortization of intangible assets	12,100	10,300
General and administrative expenses	52,680	35,666
Operating (loss) income	(40,092)	14,545
Total other income (expense)	(87,058)	160,107
(Loss) income before income taxes	(127,150)	174,652
Parent Company
Other operating expenses:
General and administrative expenses	37,266	26,692
Operating Segments
Other operating expenses:
Engineering and development expenses - industrial operations	626	200
Sales and marketing expenses - industrial operations	8,621	1,538
Amortization of intangible assets	1,732	399
General and administrative expenses	13,682	8,575
Total other operating expenses	24,661	10,712
Operating (loss) income	(2,826)	41,237
Other patent portfolio expense	0	162
Operating Segments | Intellectual property operations
Other operating expenses:
Other patent portfolio expense	0	162
Operating Segments | Industrial operations
Other operating expenses:
Other patent portfolio expense	0	0
Intellectual property operations
Revenues:
Revenues	19,508	76,043
Cost of revenues:
Inventor royalties	1,212	1,142
Contingent legal fees	2,444	12,074
Litigation and licensing expenses	3,970	5,462
Amortization of patents	10,403	9,851
Cost of sales	0	0
Total cost of revenues	18,029	28,691
Segment gross profit	1,479	47,352
Intellectual property operations | Operating Segments
Other operating expenses:
Engineering and development expenses - industrial operations	0	0
Sales and marketing expenses - industrial operations	0	0
Amortization of intangible assets	0	0
General and administrative expenses	5,428	6,177
Total other operating expenses	5,428	6,177
Operating (loss) income	(3,949)	41,175
Industrial operations
Revenues:
Revenues	39,715	12,004
Cost of revenues:
Inventor royalties	0	0
Contingent legal fees	0	0
Litigation and licensing expenses	0	0
Amortization of patents	0	0
Cost of sales	19,359	7,407
Total cost of revenues	19,359	7,407
Segment gross profit	20,356	4,597
Industrial operations | Operating Segments
Other operating expenses:
Engineering and development expenses - industrial operations	626	200
Sales and marketing expenses - industrial operations	8,621	1,538
Amortization of intangible assets	1,732	399
General and administrative expenses	8,254	2,398
Total other operating expenses	19,233	4,535
Operating (loss) income	1,123	62
License fees
Revenues:
Revenues	19,508	76,043
License fees | Intellectual property operations
Revenues:
Revenues	19,508	76,043
License fees | Industrial operations
Revenues:
Revenues	0	0
Printers and parts
Revenues:
Revenues	16,118	4,961
Printers and parts | Intellectual property operations
Revenues:
Revenues	0	0
Printers and parts | Industrial operations
Revenues:
Revenues	16,118	4,961
Consumable products
Revenues:
Revenues	19,314	5,973
Consumable products | Intellectual property operations
Revenues:
Revenues	0	0
Consumable products | Industrial operations
Revenues:
Revenues	19,314	5,973
Services
Revenues:
Revenues	4,283	1,070
Services | Intellectual property operations
Revenues:
Revenues	0	0
Services | Industrial operations
Revenues:
Revenues	$ 4,283	$ 1,070