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           Potentially Dilutive Shares (Detail) 
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        3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
| 
           Dec. 31, 2014 
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           Dec. 31, 2013 
         | 
        
           Dec. 31, 2014 
         | 
        
           Dec. 31, 2013 
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| Earnings Per Share [Abstract] | ||||
| Potentially dilutive shares | 922,388us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment | 1,717,450us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment | 1,156,597us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment | 1,847,304us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment | 
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- Details 
          
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- Definition 
          The sum of dilutive potential common shares or units used in the calculation of the diluted per-share or per-unit computation. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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