v3.3.1.900
Related Party Transactions (Details 4) - CRRM
$ in Thousands
12 Months Ended
Dec. 31, 2015
USD ($)
renewal
Dec. 31, 2014
USD ($)
Dec. 31, 2013
USD ($)
Office and Laboratory Space Lease Agreement      
Related Party Transaction [Line Items]      
Rent expense | $ $ 113 $ 112 $ 107
Office and Laboratory Space Lease Agreement | CRNF      
Related Party Transaction [Line Items]      
Notice period for termination of agreement 180 days    
Number of times agreement can be renewed | renewal 5    
Additional renewal period of agreement 1 year    
Office and Laboratory Space Lease Agreement | CRNF | Minimum      
Related Party Transaction [Line Items]      
Notice period for termination of agreement 60 days    
Environmental Agreement | CRNF | Minimum      
Related Party Transaction [Line Items]      
Initial term of agreement (in years) 20 years