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Summary of Significant Accounting Policies (Detail) - Basic and diluted earnings per share computations for the Companys reported net income attributable to common stockholders - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 12 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Accounting Policies [Abstract]    
Net income $ 2,506 $ 2,604
Less: Net income attributable to nonvested common stock (in Dollars) 108 109
Net income attributable to common stockholders $ 2,398 $ 2,495
Weighted average total shares outstanding - basic 3,890 3,766
Less: weighted average non-vested shares outstanding 167 157
Weighted average number of common shares outstanding - basic 3,723 3,609
Potential common shares from non-vested stock awards and the assumed exercise of stock options 94  
Weighted average common shares outstanding - diluted 3,817 3,734
Net income per share - basic (in Dollars per share) $ 0.64 $ 0.69
Net income per share - diluted (in Dollars per share) $ 0.63 $ 0.67