XML 36 R25.htm IDEA: XBRL DOCUMENT v3.20.4
Allowance For Doubtful Accounts (Narrative) (Details) - USD ($)
Dec. 26, 2020
Sep. 26, 2020
Allowance For Doubtful Accounts [Abstract]    
Allowance for doubtful accounts receivable $ 325,000 $ 325,000