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Quantitative Information about Inputs and Valuation Methodologies Used for Fair Value Measurements Classified in Level 3 (Detail) - USD ($)
$ in Thousands
1 Months Ended 6 Months Ended
Jul. 31, 2014
Sep. 30, 2015
Mar. 31, 2015
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]      
Contingent consideration   $ 6,817 $ 6,510
Discount rate 22.50%    
Level 3      
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]      
Contingent consideration   6,817 $ 6,510
ECP Entwicklungsgesellschaft mbH | Level 3 | Probability weighted income approach      
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]      
Contingent consideration   $ 6,817  
ECP Entwicklungsgesellschaft mbH | Level 3 | Probability weighted income approach | Contingent Consideration | Base Case Scenario      
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]      
Probability of occurrence   40.00%  
ECP Entwicklungsgesellschaft mbH | Level 3 | Probability weighted income approach | Contingent Consideration | Minimum      
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]      
Milestone date   2018  
Discount rate   8.00%  
ECP Entwicklungsgesellschaft mbH | Level 3 | Probability weighted income approach | Contingent Consideration | Minimum | Various Upside and Downside Scenarios      
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]      
Probability of occurrence   5.00%  
ECP Entwicklungsgesellschaft mbH | Level 3 | Probability weighted income approach | Contingent Consideration | Maximum      
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]      
Milestone date   2021  
Discount rate   12.00%  
ECP Entwicklungsgesellschaft mbH | Level 3 | Probability weighted income approach | Contingent Consideration | Maximum | Various Upside and Downside Scenarios      
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]      
Probability of occurrence   25.00%