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Redeemable Convertible Preferred Stock - Preferred Stock and Warrants Calculated Using the Black Scholes Merton Pricing Model (Detail) (USD $) | 12 Months Ended
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Dec. 31, 2014
Preferred stock and warrants calculated using the Black Scholes Merton pricing model |
Number of warrants | 325,000 us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
Expiration date | May 02, 2020
Warrant |
Preferred stock and warrants calculated using the Black Scholes Merton pricing model |
Exercise price | 6.62 us-gaap_FairValueAssumptionsExercisePrice / us-gaap_FinancialInstrumentAxis = us-gaap_WarrantMember
Expected volatility of underlying stock | 74.00%us-gaap_FairValueAssumptionsExpectedVolatilityRate / us-gaap_FinancialInstrumentAxis = us-gaap_WarrantMember
Risk-free interest rate | 1.62%us-gaap_FairValueAssumptionsRiskFreeInterestRate / us-gaap_FinancialInstrumentAxis = us-gaap_WarrantMember
Dividend yield | 0.00%us-gaap_FairValueAssumptionsExpectedDividendRate / us-gaap_FinancialInstrumentAxis = us-gaap_WarrantMember
Expected life of warrants | 8 years
Weighted-average fair value of warrants | 3.11 aeti_FinancialInstrumentsWeightedAverageFairValue / us-gaap_FinancialInstrumentAxis = us-gaap_WarrantMember

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- Definition Expiration date of warrants held. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column A + Details
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- Definition Agreed upon price for the exchange of the underlying asset. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258 + Details
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