FAIR VALUE MEASUREMENTS (Detail Textuals) - USD ($) $ in Millions	Dec. 31, 2018	Sep. 30, 2018	Dec. 31, 2017	Sep. 30, 2017
Fair Value Disclosures [Abstract]
Aggregate principal amount of fixed-rate debt	$ 7.4	$ 7.3	$ 12.0	$ 12.0

Represents aggregate principal amount of company's fixed-rate debt.

No definition available.

Name:	esoa_DebtBearingFixedInterestRatePrincipalAmount
Namespace Prefix:	esoa_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant