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Stock-Based Compensation (Summary of Stock Option Activity under Share Based Compensation Plan) (Details) - Employee Stock Option [Member] - $ / shares
6 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Shares    
Outstanding-beginning of year 540,444  
Options granted 76,796  
Options exercised (6,864) (3,891)
Forfeited (12,991)  
Expired (13,917)  
Outstanding December 31, 2015 583,468  
Exercisable December 31, 2015 294,533  
Weighted Average Exercise Price    
Outstanding-beg of year $ 5.27  
Options granted 5.31  
Options exercised 2.20  
Forfeited 8.08  
Expired 17.04  
Outstanding March 31, 2016 4.97  
Exercisable March 31, 2016 $ 4.45  
Weighted Average Remaining Contractual Life (Yrs.)    
Outstanding March 31, 2016 7 years 4 months 24 days  
Exercisable March 31, 2016 6 years 1 month 6 days