SEGMENT REPORTING - Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Segment Reporting Information [Line Items]
Fair Value	$ 246,484	$ 361,778
Equity securities without readily determinable fair value	5,816	5,816
Investment securities - equity method investments	30,934	30,934
Cost	283,234	398,528
Other parent assets	152,283	172,726
Total assets	661,440	798,856
Intellectual property operations
Segment Reporting Information [Line Items]
Total assets	171,647	175,286
Industrial operations
Segment Reporting Information [Line Items]
Total assets	$ 54,276	$ 52,316