Quantitative Information about Inputs and Valuation Methodologies Used for Fair Value Measurements Classified in Level 3 (Detail) (USD $) In Thousands, unless otherwise specified	1 Months Ended					6 Months Ended
	Jul. 31, 2014	Sep. 30, 2014	Sep. 30, 2014 Level 3	Sep. 30, 2014 ECP Entwicklungsgesellschaft mbH	Sep. 30, 2014 ECP Entwicklungsgesellschaft mbH Level 3 Probability weighted income approach	Sep. 30, 2014 ECP Entwicklungsgesellschaft mbH Level 3 Probability weighted income approach Contingent Consideration Minimum	Sep. 30, 2014 ECP Entwicklungsgesellschaft mbH Level 3 Probability weighted income approach Contingent Consideration Maximum
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Contingent consideration		$ 5,797	$ 5,797	$ 5,800	$ 5,797
Milestone date						2018	2021
Discount rate	22.50%					8.00%	12.00%
Probability of occurrence						0.00%	100.00%