Summary of Significant Accounting Policies (Details 2) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Reduction to gross product sales:
Company product sales, net	$ 19,853	$ 15,422
Gross-To-Net Sales Adjustments
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross Company product sales	54,300	26,823
Reduction to gross product sales:
Chargebacks and billbacks	30,015	12,345
Sales discounts and other allowances	7,849	5,287
Total reduction to gross product sales	37,864	17,632
Company product sales, net	$ 16,436	$ 9,191