CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands		6 Months Ended
		Jun. 30, 2019		Jun. 30, 2018
Payments to Acquire Interest in Subsidiaries and Affiliates		$ (60,000)
Payment for Contingent Consideration Liability, Financing Activities		1,071		$ 0
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest		2,103		(110,694)
Assets held for sale reclassified from other assets to intangibles		0		1,811
Payments to Acquire Intangible Assets		1,700		0
Adjustments to reconcile net income to net cash provided by operating activities:
Amortization of convertible notes		3,876		3,911
Amortization of Intangible Assets		3,170		12,677
Amortization Of Right of Use Assets		441
Impairment of Intangible Assets, Finite-lived		0		152,330
Change in fair value of acquired royalty rights		28,142		(23,933)
Equity Securities without Readily Determinable Fair Value, Upward Price Adjustment, Annual Amount		(37,907)
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Change in Unrealized Gain (Loss)		(7,577)		(74)
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability		0		(22,735)
Depreciation, Amortization and Accretion, Net		1,649		2,028
Gain (Loss) on Sale of Investments		0		(764)
Gain (Loss) on Disposition of Property Plant Equipment		0		66
Provision for Doubtful Accounts		(7)		43
Stock-based compensation expense		3,344		2,218
Deferred income taxes		(125)		(11,276)
Changes in assets and liabilities:
Receivables from licensees and other		3,546		11,709
Prepaid and other current assets		1,647		(6,816)
Accrued interest on notes receivable		0		(150)
Increase (Decrease) in Inventories		1,857		(5,834)
Other assets		476		(1,531)
Accounts payable		1,670		(8,679)
Accrued liabilities		(14,656)		(11,759)
Increase (Decrease) in Income Taxes Payable		9		(1,159)
Other long-term liabilities		167		666
Net cash used in operating activities		(8,175)		(19,756)
Cash flows from investing activities
Proceeds from Sale of Available-for-sale Securities, Equity		0		4,116
Payments for (Proceeds from) Productive Assets		32,726		37,993
Payments to Acquire Property, Plant, and Equipment		163		3,915
Net cash (used in) provided by investing activities		(29,137)		38,194
Cash flows from financing activities
Repayments of Secured Debt		0		126,447
Payments for Repurchase of Common Stock		(71,266)		(23,604)
Net cash used in financing activities		(72,337)		(150,051)
Net decrease in cash and cash equivalents		(109,649)		(131,613)
Cash and cash equivalents at beginning of the period	[1]	394,590		527,266
Cash and cash equivalents at end of period	[3]	284,941	[2]	395,653
Supplemental cash flow information
Cash (refunded) paid for income taxes		(2,693)		3,980
Cash paid for interest		$ 2,063		$ 4,591

[1] Note 1

[2] unaudited

[3] unaudited