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Earnings Per Share Data - Basic and Diluted Earnings (loss) Per Share (Detail) (USD $)
 3 Months Ended 6 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Mar. 31, 2014
Mar. 31, 2013
Earnings Per Share [Abstract]        
Net income $ 1,901,000 $ 2,977,000 $ 2,347,000 $ 2,001,000
Common Shares:        
Weighted average common shares outstanding 9,518,000 9,518,000 9,518,000 9,518,000
Effect of dilutive stock options 73,000 0 58,000 0
Diluted shares outstanding 9,591,000 9,518,000 9,576,000 9,518,000
Basic:        
Net earnings per share $ 0.20 $ 0.31 $ 0.25 $ 0.21
Diluted:        
Net earnings per share $ 0.20 $ 0.31 $ 0.25 $ 0.21