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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
	Dec. 31, 2014
Preferred stock and warrants calculated using the Black Scholes Merton pricing model
Number of warrants	325,000us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
Expiration date	May 02, 2020
Warrant
Preferred stock and warrants calculated using the Black Scholes Merton pricing model
Exercise price	6.62us-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	3.11aeti_FinancialInstrumentsWeightedAverageFairValue / us-gaap_FinancialInstrumentAxis = us-gaap_WarrantMember

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Financial instruments weighted average fair value.

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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

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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.

+ 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)(2))

-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690



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Agreed upon price for the exchange of the underlying asset.

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-Name Accounting Standards Codification

-Topic 820

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-Section 50

-Paragraph 2

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Expected dividends to be paid to holders of the underlying shares or financial instruments (expressed as a percentage of the share or instrument's price).

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Period the instrument, asset or liability is expected to be outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Measure of dispersion, in percentage terms (for instance, the standard deviation or variance), for a given stock price.

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Risk-free interest rate assumption used in valuing an instrument.

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