Summary of Significant Accounting Policies (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Summary of Significant Accounting Policies
Shipping, Handling and Transportation Costs	$ 2,600	$ 2,500	$ 2,400
Research and Development Costs disclosures
Margin potential on sale of pre-launch inventory (as a percentage)	100.00%
Restricted Cash and Restricted Short-Term Investments disclosures
Restricted cash and restricted short-term investments	$ 1,285	$ 1,495