Revenues, Recognition and Allowances (Details 2) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Revenue from Contract with Customer [Abstract]
Gross Company product sales	$ 40,111	$ 53,460	$ 124,801	$ 174,504
Deduction to gross product sales:
Chargebacks and billbacks	10,739	30,954	49,103	105,059
Wholesaler fees for service	1,662	1,511	2,774	5,715
Sales discounts and other allowances	11,335	11,559	28,636	26,174
Total reduction to gross product sales	23,736	44,024	80,513	136,948
Company product sales, net	$ 16,375	$ 9,436	$ 44,288	$ 37,556