Annual report pursuant to Section 13 and 15(d)

Note B - Commitments and Facilities (Details Textual)

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Note B - Commitments and Facilities (Details Textual) - USD ($)
12 Months Ended
Apr. 25, 2017
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2016
Nov. 13, 2014
Operating Leases, Rent Expense, Total   $ 869,000 $ 768,000 $ 658,000  
Stock Repurchase Program, Authorized Amount $ 12,000,000       $ 8,000,000
Stock Repurchase Program, Increase in Authorized Amount $ 4,000,000        
Stock Repurchase Program, Remaining Authorized Repurchase Amount   $ 5,409,326