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Potentially Dilutive Shares (Detail) | 12 Months Ended
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Mar. 31, 2015 | Mar. 31, 2014
Earnings Per Share [Abstract] |  |
Potentially dilutive shares | 1,574,372 us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment | 1,169,555 us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment

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- Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
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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. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration