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Financial Instruments and Financial Risks (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2021 USD ($)
Financial Instruments and Financial Risk Management [Line Items]
Equity marketable securities	$ 337
Debt marketable securities	$ 5,845

X

- Definition

Debt Marketable Securities.

+ References

No definition available.

+ Details

Name:	sfet_DebtMarketableSecurities
Namespace Prefix:	sfet_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Equity Marketable Securities.

+ References

No definition available.

+ Details

Name:	sfet_EquityMarketableSecurities
Namespace Prefix:	sfet_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	sfet_FinancialInstrumentsandFinancialRisksDetailsLineItems
Namespace Prefix:	sfet_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration