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Leases (Details) - Schedule of Right-of-Use Assets - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022
Leases (Details) - Schedule of Right-of-Use Assets [Line Items] |  |
Cost, Balance at beginning | $ 943 | $ 919
Cost, Balance at end of year | 1,719 | 943
Accumulated amortization, Balance at beginning of year | (753) | (468)
Accumulated amortization, Balance at end of year | (940) | (753)
Total | 779 | 190
Cost, Additions during year | 903 | 45
Cost, Disposals during year | (127) | (21)
Accumulated amortization, Additions during year | (287) | (291)
Accumulated amortization, Disposals during year | 100 | 6
Property [Member] |  |
Leases (Details) - Schedule of Right-of-Use Assets [Line Items] |  |
Cost, Balance at beginning | 763 | 763
Cost, Balance at end of year | 1,642 | 763
Accumulated amortization, Balance at beginning of year | (643) | (413)
Accumulated amortization, Balance at end of year | (896) | (643)
Total | 746 | 120
Cost, Additions during year | 879 |
Cost, Disposals during year |  |
Accumulated amortization, Additions during year | (253) | (230)
Accumulated amortization, Disposals during year |  |
Vehicles [Member] |  |
Leases (Details) - Schedule of Right-of-Use Assets [Line Items] |  |
Cost, Balance at beginning | 180 | 156
Cost, Balance at end of year | 77 | 180
Accumulated amortization, Balance at beginning of year | (110) | (55)
Accumulated amortization, Balance at end of year | (44) | (110)
Total | 33 | 70
Cost, Additions during year | 24 | 45
Cost, Disposals during year | (127) | (21)
Accumulated amortization, Additions during year | (34) | (61)
Accumulated amortization, Disposals during year | $ 100 | $ 6

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- Definition Accumulated amortization, Additions during year. + References No definition available. + Details
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- Definition Accumulated amortization, Disposals during year. + References No definition available. + Details
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- Definition The amount of assets that represent a lessee's right to use an underlying asset for the lease term. Underlying asset is an asset that is the subject of a lease, for which the right to use that asset has been provided by a lessor to a lessee. + References No definition available. + Details
Name: | alar_LeaseRightOfUseAssets
Namespace Prefix: | alar_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- References No definition available. + Details
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- Definition Accumulated amortization on long-term land leases capitalized as part of real property. + References No definition available. + Details
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- Definition Right of use asset disposal during period. + References No definition available. + Details
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- Definition The amount of additions to right-of-use assets. [Refer: Right-of-use assets] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 16 -IssueDate 2023-01-01 -Paragraph 53 -Subparagraph h -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2023-en-r&anchor=para_53_h&doctype=Standard -URIDate 2023-03-23 + Details
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- Definition The amount of assets that represent a lessee's right to use an underlying asset for the lease term that do not meet the definition of investment property. Underlying asset is an asset that is the subject of a lease, for which the right to use that asset has been provided by a lessor to a lessee. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 16 -IssueDate 2023-01-01 -Paragraph 53 -Subparagraph j -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2023-en-r&anchor=para_53_j&doctype=Standard -URIDate 2023-03-23 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 16 -IssueDate 2023-01-01 -Paragraph 47 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2023-en-r&anchor=para_47_a&doctype=Standard -URIDate 2023-03-23 + Details
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