CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	$ (70,691)	$ (68,859)	$ 110,701
Gain (Loss) on Disposition of Assets	3,476	0	0
Adjustments to reconcile net income to net cash provided by operating activities:
Amortization of convertible notes and term loan offering costs	7,237	7,609	11,038
Accreted interest	79
Amortization of Intangible Assets	6,306	15,831	24,689
Amortization Of Right of Use Assets	886
Impairment of Intangible Assets, Finite-lived	22,490	152,330	0
Asset Impairment Charges	10,768	8,200	0
Change in fair value of acquired royalty rights	31,042	(85,256)	(162,327)
Equity Securities without Readily Determinable Fair Value, Upward Price Adjustment, Annual Amount	(31,641)
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Change in Unrealized Gain (Loss)	(4,715)	(33)	49
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability	0	(41,631)	349
Other amortization, depreciation and accretion of embedded derivative	2,901	3,696	2,366
Inventory Write-down	(300)	(1,200)	2,000
Gains (Losses) on Extinguishment of Debt	8,430	0	0
Gain (Loss) on Sale of Investments	0	(764)	(108)
Gain (Loss) on Disposition of Property Plant Equipment	1,200	66	0
Increase (Decrease) in Other Receivables	0	0	(1,400)
Business Combination, Bargain Purchase, Gain Recognized, Amount	0	0	(9,309)
Stock-based compensation expense	7,119	4,758	3,138
Deferred taxes	(10,617)	13,846	39,172
Changes in assets and liabilities:
Receivables from licensees	8,195	9,349	11,008
Prepaid and other current assets	4,464	(5,025)	(9,100)
Accrued interest on notes receivable	0	0	1,475
Increase (Decrease) in Inventories	(21,923)	(9,508)	892
Other assets	(156)	(2,120)	(1,400)
Accounts payable	4,191	(6,642)	10,840
Accrued liabilities	(9,341)	(7,449)	13,120
Increase (Decrease) in Income Taxes Payable	1	(1,361)	(3,346)
Other long-term liabilities	4,808	(462)	(1,223)
Net cash provided by operating activities	(32,443)	(13,425)	40,624
Cash flows from investing activities
Purchases of investments	0	0	(23,213)
Payments to Acquire Other Investments	(60,000)	0	0
Proceeds from Sale and Maturity of Other Investments	0	0	75,000
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Settlements	0	(858)	0
Proceeds from Sale of Intangible Assets	5,000	0	0
Maturities of investments	0	4,116	39,956
Purchase of royalty rights	0	(20,000)	0
Payments for (Proceeds from) Productive Assets	79,272	77,969	107,253
Payments to Acquire Intangible Assets	1,700	0	0
Proceeds from Sale of Productive Assets	0	0	108,169
Proceeds from Sale and Collection of Notes Receivable	0	0	144,829
Repayment of notes receivable	0	0	8,190
Acquisition of property and equipment	(763)	(4,523)	(1,297)
Net cash provided by/(used in) investing activities	21,809	56,704	458,887
Cash flows from financing activities
Cash payment for repurchase of convertible notes	97,889
Payments for Repurchase of Convertible Preferred Stock		0	0
Repayments of Notes Payable	0	(126,447)	0
Payment of debt issuance costs	(7,451)	0	0
Purchased call options cost	3,025	0	0
Other Payments to Acquire Businesses	0	0	(87,007)
Payment for Contingent Consideration Liability, Financing Activities	(1,071)
Proceeds from Noncontrolling Interests		0	0
Cash paid for purchase of noncontrolling interest	0	0	(2,170)
Payments for Repurchase of Common Stock	(86,898)	(49,109)	(30,000)
Cash dividends paid	(9)	(48)	(222)
Excess Tax Benefit from Share-based Compensation, Financing Activities	(212)	(351)	0
Net cash used in financing activities	(190,505)	(175,955)	(119,399)
Net increase/(decrease) in cash and cash equivalents	(201,139)	(132,676)	380,112
Cash and cash equivalents at beginning of the period	394,590	527,266	147,154
Cash and cash equivalents at end of period	193,451	394,590	527,266
Supplemental cash flow information
Cash paid for income taxes	(2,689)	3,805	43,366
Interest Paid, Excluding Capitalized Interest, Operating Activities	4,265	6,654	9,286
Exchange of debt		0	0
Stock Issued	45,901	0	0
Supplemental disclosures of non-cash financing activities
Assets held for sale reclassified from other assets to intangibles	0	1,811	0
Asset held for sale reclassified from notes receivable to other assets	0	0	10,000
Extinguishment of Debt, Amount	$ 0	$ 0	$ 43,909