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Summary of Significant Accounting Policies (Schedule of Amounts Included in Consolidated Balance Sheets) (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Jun. 30, 2017
Receivables [Abstract]
Costs and estimated earnings in excess of billings (Other current assets)	$ 1,012	$ 86
Billings in excess of costs on uncompleted contracts	(259)	(2,146)
Ending balance	$ 753	$ (2,060)

X

- Definition

Costs and estimated earnings in excess of billings, net of billings in excess of costs on uncompleted contracts.

+ References

No definition available.

+ Details

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Namespace Prefix:	evi_
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Period Type:	instant

X

- Definition

Liability attributable to (i) billings in excess of costs under the percentage of completion contract accounting method representing the difference between contractually invoiced amounts (billings) and revenue recognized based, for example, on costs incurred to estimated total costs at period end or (ii) contractually invoiced amounts (billings) in excess of costs incurred and accumulated under the completed contract accounting method that are expected to be realized within one year or one operating cycle, whichever is longer, from the reporting date.

+ References

No definition available.

+ Details

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

X

- Definition

Amount of receivable reflecting the cost incurred on uncompleted contracts in excess of related billings which is expected to be collected within one year or the normal operating cycle, if longer.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.3(c)(3))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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X

- References

No definition available.

+ Details

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