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Other Long-term Liabilities - Additional Information (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2015
CHF (SFr)
Dec. 31, 2014
USD ($)
Jan. 31, 2014
USD ($)
Jul. 31, 2013
CHF (SFr)
May. 31, 2013
USD ($)
Facility in Switzerland          
Schedule Of Other Long Term Liabilities [Line Items]          
Line of credit facility, maximum borrowing capacity | SFr       SFr 400,000  
Line of credit SFr 220,000 $ 232      
Principal and interest payment, start date Jan. 01, 2014        
Principal and interest payment, end date Dec. 31, 2018        
Line of credit facility, Interest rate 5.00%        
Facility in the U.S.          
Schedule Of Other Long Term Liabilities [Line Items]          
Line of credit | $     $ 226   $ 226
Principal and interest payment, start date Jun. 01, 2013        
Principal and interest payment, end date May 01, 2023        
Line of credit facility, Interest rate 7.00%