| Fair Value Measurements - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified | 6 Months Ended | ||
|---|---|---|---|
| Sep. 30, 2012 | Sep. 30, 2013 | Mar. 31, 2013 | |
| Fair Value Inputs, Liabilities, Quantitative Information [Line Items] | |||
| Contingent liability | $ 758 | $ 238 | $ 841 | 
| Change in contingent liability | $ 238 | 
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- Definition Noncurrent portion of the fair value as of the acquisition date of potential payments under the contingent consideration arrangement, including cash and shares as applicable. No definition available. 
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- Definition This element represents the amount of any change, including any differences arising upon settlement, recognized during the reporting period in the value of a liability, arising from an item of contingent consideration, assumed in a business combination. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Details 
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