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Consolidated Statements of Earnings (Unaudited) (Parentheticals) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Dec. 27, 2014	Dec. 28, 2013
Allocated Share Based Compensation	$ 432us-gaap_AllocatedShareBasedCompensationExpense	$ 445us-gaap_AllocatedShareBasedCompensationExpense
Cost Of Goods Sold [Member]
Allocated Share Based Compensation	112us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_IncomeStatementLocationAxis = jjsf_CostOfGoodsSoldMember	118us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_IncomeStatementLocationAxis = jjsf_CostOfGoodsSoldMember
Marketing [Member]
Allocated Share Based Compensation	172us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_IncomeStatementLocationAxis = jjsf_MarketingMember	170us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_IncomeStatementLocationAxis = jjsf_MarketingMember
Distribution [Member]
Allocated Share Based Compensation	11us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_IncomeStatementLocationAxis = jjsf_DistributionMember	10us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_IncomeStatementLocationAxis = jjsf_DistributionMember
Administrative [Member]
Allocated Share Based Compensation	$ 229us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_IncomeStatementLocationAxis = jjsf_AdministrativeMember	$ 226us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_IncomeStatementLocationAxis = jjsf_AdministrativeMember

X

- Definition

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 1

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SAB TOPIC 14.F)

-URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809



Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (h)(1)(i)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901



Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

-Number Topic 14

-Section F

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