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Employee Benefits (Details Narrative) (USD $)
 12 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2010
Notes to Financial Statements      
Savings/profit sharing plan company contribution $ 669,000 $ 632,000 $ 612,000
Management Security Plan expense 161,000 150,000 143,000
Management Security Plan accrued benefit 1,232,000 1,169,000  
Accrued postretirement benefit obligation 361,000 334,000  
Net periodic postretirement benefit cost $ 5,000 $ 18,000 $ 12,000
Net periodic postretirement benefit cost discount rate 4.00% 5.00% 5.50%
Accumulated postretirement benefit obligation discount rate 4.00% 5.00% 5.50%