Condensed Consolidated Statements of Cash Flows Statement - USD ($)	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Cash flows from operating activities:
Net income (loss) including noncontrolling interests in operating subsidiaries	$ (93,481,000)	$ 131,984,000
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	52,127,000	(146,281,000)
Loss on Sale of Investments	(5,539,000)	0
Depreciation and amortization	15,582,000	16,780,000
Non-cash stock compensation	172,000	13,068,000
Impairment of Intangible Assets (Excluding Goodwill)	29,210,000	2,248,000
Other	(506,000)	(473,000)
Changes in assets and liabilities:
Accounts receivable	(5,877,000)	26,450,000
Prepaid expenses and other assets	(183,000)	(874,000)
Accounts payable and accrued expenses	1,052,000	(6,608,000)
Royalties and contingent legal fees payable	3,864,000	5,916,000
Net cash provided by operating activities	7,499,000	34,923,000
Cash flows from investing activities:
Payments to Acquire Businesses, Net of Cash Acquired	10,440,000	0
Payments to Acquire Other Investments	(7,000,000)	(31,514,000)
Advances to Investee	0	(4,000,000)
Purchase of available-for-sale investments	(65,883,000)	(424,945,000)
Maturities and sale of available-for-sale investments	32,508,000	386,920,000
Net cash provided by (used in) investing activities	(29,935,000)	(73,539,000)
Cash flows from financing activities:
Repurchase of common stock	(4,634,000)	0
Repurchased Restricted Common Stock	229,000	35,000
Proceeds from exercises of stock options	257,000	680,000
Net cash used in financing activities	(4,606,000)	645,000
Increase (decrease) in cash and cash equivalents	(27,042,000)	(37,971,000)
Cash and cash equivalents, beginning	136,604,000	139,052,000
Cash and cash equivalents, ending	$ 109,562,000	$ 101,081,000