Note 7 - Employee Retirement Benefit Plans: Schedule of Settlement of Pension Plan Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Text Block [Abstract]
Current portion of pension settlement obligation	$ 468	$ 438
Pension settlement obligation, net of current portion	3,575	4,042
Pension Settlement Obligation	$ 4,043	$ 4,480

Represents the monetary amount of Pension settlement obligation, net of current portion, as of the indicated date.

No definition available.

Name:	escc_PensionSettlementObligationNetOfCurrentPortion
Namespace Prefix:	escc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant