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SUBSEQUENT EVENTS (Details) - Subsequent Event [Member] - Nistec [Member] - USD ($) $ in Millions	1 Months Ended
	Apr. 30, 2018	Mar. 31, 2018
Subsequent Event [Line Items]
Proceeds from issuance of debt	$ 2.5	$ 4.0
NIS [Member]
Subsequent Event [Line Items]
Proceeds from issuance of debt		$ 1.1

X

- Definition

The cash inflow during the period from additional borrowings in aggregate debt. Includes proceeds from short-term and long-term debt.

+ References

No definition available.

+ Details

Name:	us-gaap_ProceedsFromIssuanceOfDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

+ References

No definition available.

+ Details

Name:	us-gaap_SubsequentEventLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DebtInstrumentAxis=eltk_NistecMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_CurrencyAxis=currency_ILS
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: