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Subsequent Events - Additional Information (Detail) (USD $) In Millions, except Share data, unless otherwise specified | 0 Months Ended |  |  |
--- | --- | --- | --- | ---
Nov. 13, 2014 | Apr. 29, 2015 | Mar. 31, 2015 | Mar. 31, 2014 | Apr. 24, 2015
Subsequent Event [Line Items] |  |  |  |  |
Common stock, shares issued |  |  | 9,624,275 us-gaap_CommonStockSharesIssued | 7,892,990 us-gaap_CommonStockSharesIssued |
Offer price of common stock | $ 11.00 us-gaap_SaleOfStockPricePerShare |  |  |  |
Proceeds From Issuance Of Common Stock | $ 9.1 us-gaap_ProceedsFromIssuanceOfCommonStock |  |  |  |
Subsequent Event |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |
Common stock, shares issued |  |  |  |  | 4,000,000 us-gaap_CommonStockSharesIssued / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember
Offer price of common stock |  |  |  |  | $ 6.00 us-gaap_SaleOfStockPricePerShare / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember
Proceeds From Issuance Of Common Stock |  | $ 22.3 us-gaap_ProceedsFromIssuanceOfCommonStock / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember |  |  |

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- Definition Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.29) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 30 -Article 5 + Details
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Balance Type: | na
Period Type: | instant

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- Definition The cash inflow from the additional capital contribution to the entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3255-108585 + Details
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Balance Type: | debit
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- Definition Per share amount received by subsidiary or equity investee for each share of common stock issued or sold in the stock transaction. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

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- Details
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- Details
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