Document And Entity Information - shares	6 Months Ended
	Mar. 26, 2016	Apr. 20, 2016
Entity Registrant Name	J&J SNACK FOODS CORP
Entity Central Index Key	0000785956
Trading Symbol	jjsf
Current Fiscal Year End Date	--09-24
Entity Filer Category	Large Accelerated Filer
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Well-known Seasoned Issuer	Yes
Entity Common Stock, Shares Outstanding (in shares)		18,619,079
Document Type	10-Q
Document Period End Date	Mar. 26, 2016
Document Fiscal Year Focus	2016
Document Fiscal Period Focus	Q2
Amendment Flag	true
Amendment Description	The Company inadvertently filed its March 26, 2016 10-Q on April 25, 2016 prior to the interim financial statements being reviewed by its independent registered public accounting firm. This amendment is being filed now that the interim review is complete. Except for changes made to Item 4. Controls and Procedures and the filing of the independent registered public accounting firm’s review report and Exhibit 15, the information contained in the filing on April 25, 2016 has not been changed or updated by this filing.