Summary of Significant Accounting Policies (Details 1) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]
Product sales, net	$ 13,634	$ 15,709	$ 51,782	$ 48,156
Company product sales
Accounts, Notes, Loans and Financing Receivable [Line Items]
Product sales, net	11,751	13,901	44,075	34,185
Contract manufacturing sales
Accounts, Notes, Loans and Financing Receivable [Line Items]
Product sales, net	$ 1,883	$ 1,808	$ 7,707	$ 13,971