Represents credit facility consolidated leverage ratio for 20 million share repurchases.

No definition available.

Name:	aegn_CreditFacilityConsolidatedLeverageRatioFor20MillionShareRepurchases
Namespace Prefix:	aegn_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	instant

- Definition

Represents the credit facility consolidated leverage ratio for unlimited share repurchases.

+ References

No definition available.

+ Details

Name:	aegn_CreditFacilityConsolidatedLeverageRatioForUnlimitedShareRepurchases
Namespace Prefix:	aegn_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	instant

- Definition

Represents credit facility consolidated leverage ratio For zero Share repurchases.

+ References

No definition available.

+ Details

Name:	aegn_CreditFacilityConsolidatedLeverageRatioForZeroShareRepurchases
Namespace Prefix:	aegn_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	instant

- Definition

The maximum additional expected borrowing capacity under a credit facility.

+ References

No definition available.

+ Details

Name:	aegn_CreditFacilityMaximumAdditionalExpectedBorrowingCapacity
Namespace Prefix:	aegn_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Represents the maximum consolidated leverage ratio of credit facility.

+ References

No definition available.

+ Details

Name:	aegn_CreditFacilityMaximumConsolidatedLeverageRatio
Namespace Prefix:	aegn_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	instant

- Definition

Represents minimum consolidated fixed charge ratio of credit facility.

+ References

No definition available.

+ Details

Name:	aegn_CreditFacilityMinimumConsolidatedFixedChargeRatio
Namespace Prefix:	aegn_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	instant

- Definition

The maximum value of awards available under share-based compensation.

+ References

No definition available.

+ Details

Name:	aegn_SharebasedCompensationMaximumAwardsAvailableValue
Namespace Prefix:	aegn_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
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

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19(b),22(b))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

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

- Definition

The cash outflow for loan and debt issuance costs.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3291-108585

+ Details

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

- Details

Name:	srt_StatementScenarioAxis=srt_ScenarioForecastMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VariableRateAxis=us-gaap_LondonInterbankOfferedRateLIBORMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=aegn_A2015CreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=aegn_TermLoanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=us-gaap_RevolvingCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_TypeOfArrangementAxis=aegn_LeverageRatioFor200MillionOfShareRepurchasesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Note 14 - Subsequent Events (Details Textual) $ in Millions		3 Months Ended	11 Months Ended	23 Months Ended
Note 14 - Subsequent Events (Details Textual) $ in Millions	Apr. 29, 2020 USD ($)	Mar. 31, 2020 USD ($)	Mar. 31, 2021	Feb. 28, 2023	Sep. 30, 2021	Jun. 30, 2021 USD ($)	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Oct. 31, 2015 USD ($)
Forecast [Member]
Share-based Compensation, Maximum Awards Available, Value						$ 5.0
Subsequent Event [Member] \| London Interbank Offered Rate (LIBOR) [Member] \| Minimum [Member]
Debt Instrument, Basis Spread on Variable Rate	0.75%
A 2015 Credit Facility [Member]
Line of Credit Facility, Maximum Borrowing Capacity										$ 350.0
Debt Instrument, Face Amount										$ 650.0
Credit Facility Maximum Consolidated Leverage Ratio		3.25
Credit Facility Minimum Consolidated Fixed Charge Ratio		1.25
A 2015 Credit Facility [Member] \| Forecast [Member]
Credit Facility Maximum Consolidated Leverage Ratio			4.00		3.00	3.50	4.50	4.75	4.00
Credit Facility Minimum Consolidated Fixed Charge Ratio			1.15			1.25			1.10
A 2015 Credit Facility [Member] \| London Interbank Offered Rate (LIBOR) [Member] \| Minimum [Member]
Debt Instrument, Basis Spread on Variable Rate		1.25%
A 2015 Credit Facility [Member] \| London Interbank Offered Rate (LIBOR) [Member] \| Maximum [Member]
Debt Instrument, Basis Spread on Variable Rate		2.25%
A 2015 Credit Facility [Member] \| London Interbank Offered Rate (LIBOR) [Member] \| Forecast [Member]
Debt Instrument, Basis Spread on Variable Rate			3.50%
A 2015 Credit Facility [Member] \| London Interbank Offered Rate (LIBOR) [Member] \| Forecast [Member] \| Minimum [Member]
Debt Instrument, Basis Spread on Variable Rate				1.75%
A 2015 Credit Facility [Member] \| London Interbank Offered Rate (LIBOR) [Member] \| Forecast [Member] \| Maximum [Member]
Debt Instrument, Basis Spread on Variable Rate				3.50%
A 2015 Credit Facility [Member] \| Term Loan [Member]
Debt Instrument, Face Amount		$ 308.4
A 2015 Credit Facility [Member] \| Subsequent Event [Member] \| Term Loan [Member]
Debt Instrument, Face Amount	$ 245.0
A 2015 Credit Facility [Member] \| Revolving Credit Facility [Member]
Line of Credit Facility, Maximum Borrowing Capacity		$ 225.0
A 2015 Credit Facility [Member] \| Revolving Credit Facility [Member] \| Subsequent Event [Member]
Line of Credit Facility, Maximum Borrowing Capacity	175.0
Payments of Financing Costs, Total	2.1
Credit Facility, Maximum Additional Expected Borrowing Capacity	$ 100.0
A 2015 Credit Facility [Member] \| Revolving Credit Facility [Member] \| Subsequent Event [Member] \| Minimum [Member]
Credit Facility Consolidated Leverage Ratio for Zero Share Repurchases	3.00
A 2015 Credit Facility [Member] \| Revolving Credit Facility [Member] \| Subsequent Event [Member] \| Minimum [Member] \| Leverage Ratio for $20.0 Million of Share Repurchases [Member]
Credit Facility Consolidated Leverage Ratio for 20 Million Share Repurchases	2.50
A 2015 Credit Facility [Member] \| Revolving Credit Facility [Member] \| Subsequent Event [Member] \| Maximum [Member]
Credit Facility Consolidated Leverage Ratio for Unlimited Share Repurchases	2.50
Credit Facility Consolidated Leverage Ratio for 20 Million Share Repurchases	3.00