UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Cash flows from operating activities:
Net (loss) income including noncontrolling interests in subsidiaries	$ (54,601)	$ 33,205
Adjustments to reconcile net (loss) income including noncontrolling interests in subsidiaries to net cash (used in) provided by operating activities:
Change in fair value of investment, net	2,752	(3,704)
(Gain) loss on sale of investment	(3,591)	2,762
Depreciation and amortization	7,198	3,609
Amortization of debt discount and issuance costs	460	955
Change in fair value of Series A redeemable convertible preferred stock embedded derivative	14,683	7,708
Change in fair value of Series A warrants	11,887	2,036
Change in fair value of Series B warrants	177,296	36,867
Non-cash stock compensation	1,279	1,243
Loss on foreign currency exchange	193	4,938
Change in fair value of equity securities	(115,509)	(99,449)
(Gain) loss on sale of equity securities	(53,124)	4,272
Gain on sale of prepaid investment and derivative	0	(2,845)
Earnings on equity investment in joint venture, net of distributions received	(907)	0
Changes in assets and liabilities:
Accounts receivable	94	248
Prepaid expenses and other assets	(2,345)	1,038
Accounts payable and accrued expenses	7,002	614
Royalties and contingent legal fees payable	(369)	12,052
Net cash (used in) provided by operating activities	(7,602)	5,549
Cash flows from investing activities:
Patent acquisition	(13,000)	(13,780)
Sale of investment at fair value	3,591	1,460
Purchases of equity securities	(57,978)	(33,800)
Maturities and sales of equity securities	64,235	316,746
Purchases of prepaid investment	0	(276,275)
Equity securities derivative and forward contract acquisition cost	0	(3,989)
Purchases of property and equipment	(67)	(177)
Net cash used in investing activities	(3,219)	(9,815)
Cash flows from financing activities:
Repurchase of common stock	0	(3,998)
Issuance of Senior Secured Notes, net of lender fee	65,000	110,437
Senior Secured Notes issuance costs paid to other parties	0	(496)
Dividend on Series A Redeemable Convertible Preferred Stock	(785)	(1,120)
Issuance of Series B warrants	0	4,600
Proceeds from exercise of stock options	202	48
Paydown of Senior Secured Notes	(50,000)	0
Reissuance of Senior Secured Notes	50,000	0
Net cash provided by financing activities	64,417	109,471
Increase in cash and cash equivalents and restricted cash	53,596	105,205
Cash and cash equivalents and restricted cash, beginning	200,546	92,359
Cash and cash equivalents and restricted cash, ending	254,142	197,564
Supplemental schedule of cash flow information:
Interest paid	2,340	0
Income taxes paid	9	164
Noncash investing activities:
Trade date receivable from sale of equity securities (Note 3)	21,539	0
Patent acquisition in exchange of notes receivable	4,000	0
Patent acquisition accrued liability - short-term	8,000	0
Patent acquisition accrued liability - long-term	5,000	0
Acquisition of prepaid investment securities	$ 0	$ 231,480