BASIS OF PRESENTATION (Narrative) (Details) $ in Millions	9 Months Ended
Jun. 30, 2015 USD ($)
Basis Of Presentation [Line Items]
Payment For Working Capital Adjustment	$ 2.3

It represents the cash payment made for working capital adjustment.

No definition available.

Name:	ese_PaymentForWorkingCapitalAdjustment
Namespace Prefix:	ese_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration