Name:	avgr_DebtInstrumentCommonStockPremiumOffsetAgainstDebtDiscount
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Data Type:	xbrli:monetaryItemType
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Period Type:	instant

The debt instrument fee paid on the borrowing date and recorded as a discount to the debt.

No definition available.

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Data Type:	xbrli:monetaryItemType
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Period Type:	instant

Other costs not specifically identified, attributable to the debt instrument and a related purchase of the entity's stock by the lender and allocated to debt discount.

No definition available.

Name:	avgr_DebtInstrumentOtherCostsAllocatedToDebtDiscount
Namespace Prefix:	avgr_
Data Type:	xbrli:monetaryItemType
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Period Type:	instant

The per share premium on shares issued, representing the difference between the price per share under the agreement and the closing price on the day of the sale.

No definition available.

Name:	avgr_SharesIssuedPremiumPerShare
Namespace Prefix:	avgr_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

The maximum amount of the entity's common stock that may be sold to the counterparty per the terms of the agreement.

No definition available.

Name:	avgr_StockPurchaseAgreementMaximumAmount
Namespace Prefix:	avgr_
Data Type:	xbrli:monetaryItemType
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Period Type:	duration

The number of trading days prior to the sale of stock, over which closing prices are averaged to determine the price per share under the agreement.

No definition available.

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Data Type:	xbrli:integerItemType
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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

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Data Type:	xbrli:stringItemType
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The amount of debt discount that was originally recognized at the issuance of the instrument that has yet to be amortized.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 45

-Paragraph 1A

-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28541-108399

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 55

-Paragraph 8

-URI http://asc.fasb.org/extlink&oid=34725769&loc=d3e28878-108400

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Data Type:	xbrli:monetaryItemType
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Period Type:	instant

Price of a single share of a number of saleable stocks of a company.

No definition available.

Name:	us-gaap_SharePrice
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

Amount per share or per unit of equity securities issued by non-development stage entity.

No definition available.

Name:	us-gaap_SharesIssuedPricePerShare
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

Number of new stock issued during the period.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section 50

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.3-04)

-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Article 3

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 29, 30

-Article 5

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

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Name:	us-gaap_CounterpartyNameAxis=avgr_CRGPartnersIILPMember
Namespace Prefix:
Data Type:	na
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Name:	us-gaap_StatementEquityComponentsAxis=us-gaap_CommonStockMember
Namespace Prefix:
Data Type:	na
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Name:	us-gaap_CreditFacilityAxis=avgr_TermLoanAgreementMember
Namespace Prefix:
Data Type:	na
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