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Commitments and Contingencies (Narrative) (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Jun. 30, 2019
Commitments and Contingencies Disclosure [Abstract]
Outstanding performance and payment bonds	$ 8,000	$ 8,000

X

- Definition

Outstanding performance and payment bonds.

+ References

No definition available.

+ Details

Name:	evi_OutstandingPerformanceAndPaymentBonds
Namespace Prefix:	evi_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- References

No definition available.

+ Details

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