Condensed Consolidated Statements of Cash Flows Statement - USD ($)	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Cash flows from operating activities:
Net income (loss) including noncontrolling interests in operating subsidiaries	$ (60,617,000)	$ (26,385,000)
Adjustments to reconcile net loss including noncontrolling interests in operating subsidiaries to net cash provided by operating activities:
Gain on Conversion of Loan and Accrued Interest	0	2,671,000
Gain on exercise of Primary Warrant	0	(4,616,000)
Change in fair value of investment, net	29,750,000	12,698,000
Depreciation and amortization	10,627,000	11,134,000
Non-cash stock compensation	182,000	3,615,000
Impairment of Intangible Assets (Excluding Goodwill)	29,210,000	0
Other	(313,000)	(598,000)
Changes in assets and liabilities:
Accounts receivable	(934,000)	12,505,000
Prepaid expenses and other assets	(571,000)	(1,474,000)
Accounts payable and accrued expenses	861,000	(5,054,000)
Royalties and contingent legal fees payable	1,436,000	(4,481,000)
Net cash provided by operating activities	9,631,000	(5,327,000)
Cash flows from investing activities:
Payments to Acquire Other Investments	(7,000,000)	(31,514,000)
Advances to Investee	0	(4,000,000)
Purchase of available-for-sale investments	(49,895,000)	(331,412,000)
Maturities and sale of available-for-sale investments	15,400,000	295,807,000
Net cash provided by (used in) investing activities	(41,495,000)	(71,119,000)
Cash flows from financing activities:
Repurchase of common stock	(4,634,000)	0
Repurchased Restricted Common Stock	7,000	35,000
Proceeds from exercises of stock options	51,000	649,000
Net cash used in financing activities	(4,590,000)	614,000
Increase (decrease) in cash and cash equivalents	(36,454,000)	(75,832,000)
Cash and cash equivalents, beginning	136,604,000	139,052,000
Cash and cash equivalents, ending	$ 100,150,000	$ 63,220,000