Current portions of long-term debt classified as trade payables.

No definition available.

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Namespace Prefix:	eltk_
Data Type:	xbrli:monetaryItemType
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- Definition

Ratio of shareholders' equity to total assets required to be maintained under debt covenants.

+ References

No definition available.

+ Details

Name:	eltk_RatioOfShareholdersEquityToTotalAssetsRequiredToBeMaintainedUnderDebtCovenants
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Data Type:	num:percentItemType
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Period Type:	instant

- Definition

Stockholders' equity, including portion attributable to noncontrolling interest, minimum equity to be maintained under debt covenants.

+ References

No definition available.

+ Details

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Namespace Prefix:	eltk_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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No definition available.

+ Details

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Period Type:	duration

- Definition

Amount of stockholders' equity including the portion attributable to noncontrolling interests, after the cumulative effect adjustment of a new accounting principle applied in the period of adoption.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
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- Details

Name:	dei_LegalEntityAxis=eltk_CreditorBankOneMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

LONG-TERM DEBT, EXCLUDING CURRENT MATURITIES (Narrative) (Details) - USD ($) $ in Thousands	1 Months Ended	12 Months Ended
	Apr. 30, 2014	Dec. 31, 2013	Dec. 31, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Current portions of long-term debt classified as trade payables			$ 416	$ 300
Adjusted shareholders' equity			$ 2,500
Creditor Bank One [Member]
Debt Instrument [Line Items]
Minimum shareholder's equity to be maintained under debt covenants	$ 4,500	$ 4,500
Ratio of shareholders' equity to total assets required to be maintained under debt covenants	17.00%	17.00%