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Related Parties Transactions and Balances (Details) - Schedule of Balances with Related Parties - USD ($) $ in Thousands | Dec. 31, 2023 | Dec. 31, 2022
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Schedule of Balances with Related Parties [Abstract] |  |
Employees payable | $ 376 | $ 324
Accounts payable | 29 | 40
Total of balances with related parties | $ 405 | $ 364

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- Definition The amount of employees payable. + References No definition available. + Details
Name: | alar_EmployeesPayable
Namespace Prefix: | alar_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- References No definition available. + Details
Name: | alar_ScheduleOfBalancesWithRelatedPartiesAbstract
Namespace Prefix: | alar_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Amount of balances with related parties. + References No definition available. + Details
Name: | alar_TotalOfBalancesWithRelatedParties
Namespace Prefix: | alar_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition The amounts payable resulting from related party transactions. [Refer: Related parties [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 24 -IssueDate 2023-01-01 -Paragraph 20 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=24&code=ifrs-tx-2023-en-r&anchor=para_20&doctype=Standard -URIDate 2023-03-23 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 24 -IssueDate 2023-01-01 -Paragraph 18 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=24&code=ifrs-tx-2023-en-r&anchor=para_18_b&doctype=Standard -URIDate 2023-03-23 + Details
Name: | ifrs-full_AmountsPayableRelatedPartyTransactions
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant