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v3.21.2

Financial Instruments and Financial Risks (Details) $ in Thousands | 6 Months Ended
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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