Related Party Transactions (Details) $ in Millions	Feb. 12, 2020 USD ($)
Related Party Transactions [Abstract]
Proceeds form sale of oil and gas leases	$ 0.4

Related Party Transaction, Proceeds From Sale of Oil and Gas Leases

No definition available.

Name:	este_RelatedPartyTransactionProceedsFromSaleofOilandGasLeases
Namespace Prefix:	este_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration