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Trade Receivables (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022
Trade Receivables [Abstract] |  |
Provision for credit losses | $ 0 | $ 8,000

X
- Definition Amount of expense related to credit loss from transactions other than loan and lease transactions. + References No definition available. + Details
Name: | alar_ProvisionForOtherCreditLoss
Namespace Prefix: | alar_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- References No definition available. + Details
Name: | ifrs-full_TradeAndOtherReceivablesAbstract
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration