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Transactions with Related Parties (Details) - Michael S. Steiner, Executive Vice President and Chief Operating Officer [Member]	9 Months Ended
	Mar. 31, 2016 USD ($) ft²	Mar. 31, 2015 USD ($)
Related Party Transaction [Line Items]
Lease area | ft²	27,000
Lease term	3 years
Lease effective date	Nov. 01, 2014
Payment under the lease	$ 100,600	$ 97,400
Rental payment, first year	10,275
Rental payment, second year	10,580
Rental payment, third year	$ 10,900

X

- Definition

Date which lease or group of leases is set to start, in CCYY-MM-DD format.

+ References

No definition available.

+ Details

Name:	evi_LeaseEffectiveDate
Namespace Prefix:	evi_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Amount of required minimum rental payments for operating leases for the first year.

+ References

No definition available.

+ Details

Name:	evi_OperatingLeasesRentalPaymentFirstYear
Namespace Prefix:	evi_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Amount of required minimum rental payments for operating leases for the second year.

+ References

No definition available.

+ Details

Name:	evi_OperatingLeasesRentalPaymentSecondYear
Namespace Prefix:	evi_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Amount of required minimum rental payments for operating leases for the third year.

+ References

No definition available.

+ Details

Name:	evi_OperatingLeasesRentalPaymentThirdYear
Namespace Prefix:	evi_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Amount of rent expense incurred for leased assets, including but not limited to, furniture and equipment, that is not directly or indirectly associated with the manufacture, sale or creation of a product or product line.

+ References

No definition available.

+ Details

Name:	us-gaap_LeaseAndRentalExpense
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Term of the lessee's leasing arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	us-gaap_LesseeLeasingArrangementsOperatingLeasesTermOfContract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Net rentable area for properties owned.

+ References

No definition available.

+ Details

Name:	us-gaap_NetRentableArea
Namespace Prefix:	us-gaap_
Data Type:	num:areaItemType
Balance Type:	na
Period Type:	instant

X

- Definition

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.

+ References

No definition available.

+ Details

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

X

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: