Name:	avgr_FairValueAssumptionsAdditionalEquityYearOne
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Data Type:	num:percentItemType
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Period Type:	duration

For the second fiscal year following the fiscal year in which a financial instrument is originally issued, the percentage of likelihood that the entity will need to raise additional equity, used as an input to measure fair value.

No definition available.

Name:	avgr_FairValueAssumptionsAdditionalEquityYearTwo
Namespace Prefix:	avgr_
Data Type:	num:percentItemType
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Period Type:	duration

Percentage of likelihood that the entity will experience a change of control of equity, used as an input to measure fair value.

No definition available.

Name:	avgr_FairValueAssumptionsChangeOfControlPercentage
Namespace Prefix:	avgr_
Data Type:	num:percentItemType
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Period Type:	duration

Percentage of likelihood that the entity will complete an initial public offering of equity, used as an input to measure fair value.

No definition available.

Name:	avgr_FairValueAssumptionsInitialPublicOfferingPercentage
Namespace Prefix:	avgr_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Percentage of likelihood that the entity will complete a liquidation, used as an input to measure fair value.

No definition available.

Name:	avgr_FairValueAssumptionsProbabilityOfLiquidation
Namespace Prefix:	avgr_
Data Type:	num:percentItemType
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Period Type:	duration

Amount of gain (loss) reversed in the income statement of financial instrument classified as a derivative asset (liability) after deduction of derivative liability (asset), measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

No definition available.

Name:	avgr_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationGainLossReversedInEarnings
Namespace Prefix:	avgr_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

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

Name:	us-gaap_FairValueAssumptionsExpectedVolatilityRate
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- References

No definition available.

Name:	us-gaap_FairValueInputsAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
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Risk associated with risk of default, credit spread risk and downgrade risk, expressed as a percentage, used as an input to measure fair value.

Name:	us-gaap_FairValueInputsEntityCreditRisk
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
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Period Type:	duration

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

No definition available.

Name:	us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputReconciliationRollForward
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Amount of gain (loss) recognized in the income statement of financial instrument classified as a derivative asset (liability) after deduction of derivative liability (asset), measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(1)

-URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 3

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19279-110258

Name:	us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationGainLossIncludedInEarnings
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Fair value of financial instrument classified as derivative asset (liability) after deduction of derivative liability (asset), measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.