Significant Accounting Policies - Potential Dilutive Securities Excluded from the Computation of Dilutive Weighted Average Shares Outstanding (Detail)
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12 Months Ended | |
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Dec. 31, 2014
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Dec. 31, 2013
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Dilutive Securities Included And Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] | ||
Preferred stock | 17,266,668us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount | 2,503,928us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount |
Warrant [Member] | ||
Dilutive Securities Included And Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] | ||
Preferred stock |
13,709,977us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount / us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis = us-gaap_WarrantMember |
329,617us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount / us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis = us-gaap_WarrantMember |
Stock Options [Member] | ||
Dilutive Securities Included And Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] | ||
Preferred stock |
3,556,691us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount / us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis = us-gaap_StockOptionMember |
528,154us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount / us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis = us-gaap_StockOptionMember |
Preferred Stock [Member] | ||
Dilutive Securities Included And Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] | ||
Preferred stock |
1,646,157us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount / us-gaap_StatementEquityComponentsAxis = us-gaap_PreferredStockMember |
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Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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