Condensed Consolidated Statements of Cash Flows Statement - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Cash flows from operating activities:
Net income (loss) including noncontrolling interests in operating subsidiaries	$ (32,111)	$ (12,121)
Adjustments to reconcile net loss including noncontrolling interests in operating subsidiaries to net cash provided by operating activities:
Change in fair value of investment, net	41,097	0
Depreciation and amortization	5,344	5,540
Non-cash stock compensation	(1,024)	2,128
Other	(87)	(348)
Changes in assets and liabilities:
Accounts receivable	(59)	18,969
Prepaid expenses and other assets	(863)	(1,738)
Accounts payable and accrued expenses	1,065	(2,576)
Royalties and contingent legal fees payable	36,608	(10,830)
Net cash provided by operating activities	49,970	(976)
Cash flows from investing activities:
Payments to Acquire Other Investments	(7,000)	0
Advances to Investee	0	(1,000)
Purchase of available-for-sale investments	(33,309)	(174,152)
Maturities and sale of available-for-sale investments	4,000	102,682
Net cash provided by (used in) investing activities	(36,309)	(72,470)
Cash flows from financing activities:
Repurchased Restricted Common Stock	7	25
Proceeds from exercises of stock options	31	255
Net cash used in financing activities	24	230
Increase (decrease) in cash and cash equivalents	13,685	(73,216)
Cash and cash equivalents, beginning	136,604	139,052
Cash and cash equivalents, ending	$ 150,289	$ 65,836