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Derivative Instruments - Additional Information (Detail) (USD $)
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6 Months Ended | 12 Months Ended | ||||
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Jun. 30, 2014
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Dec. 31, 2014
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Dec. 31, 2013
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Aug. 31, 2014
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Jun. 30, 2013
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Oct. 31, 2009
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| Derivative Instruments and Hedging Activities Disclosure [Abstract] | ||||||
| Number of shares of common stock called by warrants | 33,333us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights | 301,778us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights | 162,539us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights | 301,778us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights | 27,839us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights | |
| Derivative warrant liability | $ 19,932us-gaap_DerivativeLiabilitiesCurrent | |||||
| Addition to Additional-Paid in Capital | 48,380us-gaap_AdjustmentsToAdditionalPaidInCapitalWarrantIssued | |||||
| Changes in fair value of derivative warrant liability | $ 28,448us-gaap_FairValueAdjustmentOfWarrants | $ 28,448us-gaap_FairValueAdjustmentOfWarrants | $ (1,978)us-gaap_FairValueAdjustmentOfWarrants | |||
| X | ||||||||||
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- Definition
Amount of increase in additional paid in capital (APIC) resulting from the issuance of warrants. Includes allocation of proceeds of debt securities issued with detachable stock purchase warrants. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Number of securities into which the class of warrant or right may be converted. For example, but not limited to, 500,000 warrants may be converted into 1,000,000 shares. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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- Definition
Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, expected to be settled within one year or normal operating cycle, if longer. Includes assets not subject to a master netting arrangement and not elected to be offset. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Amount of expense (income) related to adjustment to fair value of warrant liability. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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