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Note C - Shareholders' Equity - Options Exercisable (Details) - $ / shares
12 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Exercisable (in shares) 30,500 38,950
Weighted average remaining contractual life (Year) 1 year 324 days 2 years 266 days
Weighted average exercise price (in dollars per share) $ 2.58 $ 2.79