Note 4 - Promissory Note (Details Textual) - USD ($) $ in Millions	3 Months Ended
Jun. 30, 2020	Dec. 31, 2019	Mar. 10, 2020
Loan Agreement with Primary Financial Leader [Member]
Debt Instrument, Face Amount			$ 3.5
Leveling 8 [Member] \| Promissory Note [Member]
Proceeds from Collection of Notes Receivable, Gross	$ 1.7	$ 0.7
Proceeds from Collection of Notes Receivable, Interest		$ 0.1
Proceeds from Collection of Notes Receivable, Principal	1.4
Notes Receivable, Balloon Payment to Be Received at Maturity	2.5
Proceeds from Collection of Notes Receivable, Prepayment Portion	$ 0.7
Notes Receivable, Interest Rate	6.00%

The amount of balloon payment of notes receivable to be received at maturity.

No definition available.

Name:	aey_NotesReceivableBalloonPaymentToBeReceivedAtMaturity
Namespace Prefix:	aey_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The interest rate for notes receivable.

+ References

No definition available.

+ Details

Name:	aey_NotesReceivableInterestRate
Namespace Prefix:	aey_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Amount of cash inflow for collection of notes receivable, gross.

+ References

No definition available.

+ Details

Name:	aey_ProceedsFromCollectionOfNotesReceivableGross
Namespace Prefix:	aey_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The amount of cash inflow from collection of notes receivable interest.

+ References

No definition available.

+ Details

Name:	aey_ProceedsFromCollectionOfNotesReceivableInterest
Namespace Prefix:	aey_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The amount of cash inflow from collection of notes receivable portion that was prepayment.

+ References

No definition available.

+ Details

Name:	aey_ProceedsFromCollectionOfNotesReceivablePrepaymentPortion
Namespace Prefix:	aey_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The amount of cash inflow from collection of notes receivable principal.

+ References

No definition available.

+ Details

Name:	aey_ProceedsFromCollectionOfNotesReceivablePrincipal
Namespace Prefix:	aey_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=119993939&loc=d3e28551-108399

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400

+ Details

Name:	us-gaap_DebtInstrumentFaceAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

Name:	us-gaap_DebtInstrumentAxis=aey_LoanAgreementWithPrimaryFinancialLeaderMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_CounterpartyNameAxis=aey_Leveling8Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis=aey_PromissoryNoteMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: