Significant Accounting Policies (Cash and Cash Equivalents) (Details)	12 Months Ended
Jun. 30, 2018
Accounting Policies [Abstract]
Maximum maturity of highly liquid investments, period	90 days

Maximum maturity of highly liquid investments, period.

No definition available.

Name:	esmc_MaximumMaturityOfHighlyLiquidInvestmentsPeriod
Namespace Prefix:	esmc_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration