Deferred Income and Other Current Assets (Details Narrative) (USD $)	Mar. 31, 2013
Deferred Income And Other Current Assets Details Narrative
Deferred income, due to delayed shipments	$ 2,028,243
Prepayment to vendors for specialized equipment	$ 2,433,717

The carrying amount of consideration received or receivable as of the balance sheet date on potential earnings that were not recognized as revenue in conformity with GAAP, and which are expected to be recognized as such within one year or the normal operating cycle, if longer, from delayed shipments.

No definition available.

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