Significant Accounting Policies (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Accounting Policies [Abstract]
Reimbursement by government	$ 8,700	$ 3,100	$ 14,200	$ 6,000
Royalty revenues	$ 24,503	$ 0	$ 24,503	$ 0