Summary of Significant Accounting Policies (Details 2) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Reduction to gross product sales:
Company product sales, net	$ 65,904	$ 43,497	$ 32,104
Gross net adjustments
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross Company product sales	217,633	99,721	51,136
Reduction to gross product sales:
Chargebacks and billbacks	141,343	50,127	26,940
Sales discounts and other allowances	27,419	17,974	4,366
Total reduction to gross product sales	168,762	68,101	31,306
Company product sales, net	$ 48,871	$ 31,620	$ 19,830