INVESTMENT AT FAIR VALUE (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Investment Holdings [Line Items]
Net realized and unrealized gain	$ 839	$ 13,661
Veritone Warrants
Investment Holdings [Line Items]
Change in fair value of investment	(2,752)	1,996
Gain on sale of investment, warrants	3,591	11,503
Veritone Common Stock
Investment Holdings [Line Items]
Change in fair value of investment	0	3,478
Loss on sale of investment, common stock	$ 0	$ (3,316)