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Number of lease extension agreements entered into by the Company during the period.

No definition available.

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Data Type:	xbrli:integerItemType
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Date which lease or group of leases is set to expire, in YYYY-MM-DD format.

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Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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Term of lessee's operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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Amount of operating lease income from lease payments paid and payable to lessor. Excludes variable lease payments not included in measurement of lease receivable.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 270
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Balance Type:	credit
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Present value of lessee's discounted obligation for lease payments from operating lease.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 842
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Present value of lessee's discounted obligation for lease payments from operating lease, classified as current.

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 210
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Balance Type:	credit
Period Type:	instant

Present value of lessee's discounted obligation for lease payments from operating lease, classified as noncurrent.

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Data Type:	xbrli:monetaryItemType
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Period Type:	instant

Amount of lessee's right to use underlying asset under operating lease.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 842
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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Weighted average discount rate for operating lease calculated at point in time.

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 842
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-Section 55
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Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

Weighted average remaining lease term for operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

Reference 1: http://www.xbrl.org/2003/role/exampleRef
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Data Type:	xbrli:durationItemType
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Period Type:	instant

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
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Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
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Name:	us-gaap_TypeOfArrangementAxis=janl_LeaseExtensionAgreementsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_TypeOfArrangementAxis=janl_LeaseExtensionAgreement1Member
Namespace Prefix:
Data Type:	na
Balance Type:
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