Label	Element	Value
Cash, Cash Equivalents, and Restricted Cash; At Carrying Value	esio_CashCashEquivalentsandRestrictedCashAtCarryingValue	$ 50,994,000

Cash, Cash Equivalents, and Restricted Cash; At Carrying Value

No definition available.

Name:	esio_CashCashEquivalentsandRestrictedCashAtCarryingValue
Namespace Prefix:	esio_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant