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

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- 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 + Details
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