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Strategic Funding - Schedule of Long-Term Loans to Cash Flow from Financing Activities (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023
Schedule of Long-Term Loan to Cash Flow from Financing Activities [Abstract] |  |
Balance at the beginning of year | $ 1,092 | $ 1,223
Long-term loans received |  | 888
Long-term loans payments (interest and principal) | (324) | (915)
Payments related to extinguishment of long-term loans |  | (134)
Allocation of transaction costs to equity |  | (158)
Financial expense, net | 202 | 188
Balance at the end of year | $ 970 | $ 1,092

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- Definition Represent the amount of costs to equity. + References No definition available. + Details
Name: | alar_AllocationOfTransactionCostsToEquity
Namespace Prefix: | alar_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Represent the amount of finance expenses. + References No definition available. + Details
Name: | alar_FinanceExpensesNet
Namespace Prefix: | alar_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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

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- Definition Represent the amount of long-term loans payments (interest and principal). + References No definition available. + Details
Name: | alar_LongtermLoansPaymentsinterestAndPrincipal
Namespace Prefix: | alar_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Payments related to extinguishment of long-term loans. + References No definition available. + Details
Name: | alar_PaymentsRelatedToExtinguishmentOfLongtermLoans
Namespace Prefix: | alar_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition The amount of loans received. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2024-01-01 -Paragraph 112 -Subparagraph c -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_112_c&doctype=Standard -URIDate 2024-03-27 + Details
Name: | ifrs-full_LoansReceived
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition The non-current portion of non-current borrowings. [Refer: Borrowings] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2024-01-01 -Paragraph 55 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_55&doctype=Standard -URIDate 2024-03-27 + Details
Name: | ifrs-full_LongtermBorrowings
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant