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Warrants - Summary of the Warrants Outstanding (Detail) - shares | 6 Months Ended |  |
--- | --- | --- | ---
Jun. 30, 2015 | Jun. 16, 2015 | Dec. 31, 2014
Preferred Stock Warrants [Member] |  |  |
Class of Warrant or Right [Line Items] |  |  |
Warrants, Issue Date, description | Various |  |
Warrants, Classification | Liability |  |
Warrants, Exercisable For | Preferred Stock |  |
Warrants Outstanding | 0 |  | 14,544,247
Private Placement Warrants [Member] |  |  |
Class of Warrant or Right [Line Items] |  |  |
Warrants, Issue Date | Jun. 15, 2015 |  |
Warrants, Classification | Equity |  |
Warrants, Exercisable For | Common Stock |  |
Warrants Outstanding | 3,190,030 |  |
Hercules Warrants [Member] |  |  |
Class of Warrant or Right [Line Items] |  |  |
Warrants, Issue Date | Jun. 15, 2015 |  |
Warrants, Classification | Equity |  |
Warrants, Exercisable For | Common Stock |  |
Warrants Outstanding | 25,150 | 25,150 |
Series A Warrants [Member] |  |  |
Class of Warrant or Right [Line Items] |  |  |
Warrants, Classification | Equity |  |
Warrants, Exercisable For | Common Stock |  |
Warrants Outstanding | 1,219,000 |  |
Series A Warrants [Member] | Minimum [Member] |  |  |
Class of Warrant or Right [Line Items] |  |  |
Warrants, Issue Date | May 31, 2015 |  |
Series A Warrants [Member] | Maximum [Member] |  |  |
Class of Warrant or Right [Line Items] |  |  |
Warrants, Issue Date | May 31, 2015 |  |
Representative's Warrants [Member] |  |  |
Class of Warrant or Right [Line Items] |  |  |
Warrants, Issue Date | May 31, 2015 |  |
Warrants, Classification | Equity |  |
Warrants, Exercisable For | Common Stock |  |
Warrants Outstanding | 37,100 |  |
Underwriter's Warrant [Member] |  |  |
Class of Warrant or Right [Line Items] |  |  |
Warrants, Issue Date | May 31, 2015 |  |
Warrants, Classification | Equity |  |
Warrants, Exercisable For | Common Stock |  |
Warrants Outstanding | 2,160 |  |

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- Definition Class of warrant or rights classification. + References No definition available. + Details
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- Definition Date the warrants or rights are exercisable, in CCYY-MM-DD format. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(i)(3)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Number of warrants or rights outstanding. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(i)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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- Definition This item provides the title of issue of securities called for by warrants or rights outstanding. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(i)(1)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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- Definition Significant terms of equity contract classified as temporary equity to issue additional shares. Temporary equity is a security with redemption features that are outside the control of the issuer, is not classified as an asset or liability in conformity with GAAP, and is not mandatorily redeemable. Includes any type of security that is redeemable at a fixed or determinable price or on a fixed or determinable date or dates, is redeemable at the option of the holder, or has conditions for redemption which are not solely within the control of the issuer. If convertible, the issuer does not control the actions or events necessary to issue the maximum number of shares that could be required to be delivered under the conversion option if the holder exercises the option to convert the stock to another class of equity. If the security is a warrant or a rights issue, the warrant or rights issue is considered to be temporary equity if the issuer cannot demonstrate that it would be able to deliver upon the exercise of the option by the holder in all cases. Includes stock with put option held by ESOP and stock redeemable by holder only in the event of a change in control of the issuer. + References No definition available. + Details
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