Contracts in Process (Narrative) (Details) - USD ($)	Jun. 30, 2020	Jun. 30, 2019
Contractors [Abstract]
Costs relating to contracts that may not be completed within the next year	$ 1,716,176	$ 2,740,804

Costs related to contracts that may not be completed within the next year or operating cycle.

No definition available.

Name:	esp_NoncurrentCostsInExcessOfBillings
Namespace Prefix:	esp_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant