Recent Accounting Pronouncements Details (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Jan. 01, 2018	Dec. 31, 2017
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Accounts Receivable, Net, Current	$ 10,572		$ 10,572		$ 4,695	$ 153
Royalties and contingent legal fees payable	7,193		7,193		3,329	1,601
Retained Earnings (Accumulated Deficit)	(411,172)		(411,172)		(317,512)	(320,018)
Stockholders' Equity Attributable to Noncontrolling Interest	1,844		1,844		1,666	$ 1,358
Licenses Revenue	13,725	$ 36,633	82,303	$ 61,944
Royalty Expense	1,181	0	24,166	4,939
Contingent legal fees	2,949	$ 12,173	19,745	$ 16,036
Adjustments for New Accounting Pronouncement [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Accounts Receivable, Net, Current	3,322		3,322		4,542
Royalties and contingent legal fees payable	1,182		1,182		1,728
Retained Earnings (Accumulated Deficit)					2,506
Stockholders' Equity Attributable to Noncontrolling Interest					$ 308
Licenses Revenue	(2,073)		(1,280)
Royalty Expense	131		448
Contingent legal fees	(649)		(594)
Balance before adjustment [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Accounts Receivable, Net, Current	7,250		7,250
Royalties and contingent legal fees payable	6,011		6,011
Licenses Revenue	15,798		83,583
Royalty Expense	1,050		23,718
Contingent legal fees	$ 3,598		$ 20,339