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Earnings Per Share of Common Stock (Detail) - Basic and diluted earnings per share computations - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 3 Months Ended 6 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Mar. 31, 2017
Mar. 31, 2016
Earnings Per Share [Abstract]        
Net income $ 428 $ 503 $ 385 $ 786
Less: Net income attributable to nonvested common stock (in Dollars) 18 23 28 30
Net income attributable to common stockholders (in Dollars) $ 410 $ 480 $ 357 $ 756
Weighted average total shares outstanding – basic 3,888 3,782 3,986 3,732
Less: weighted average non-vested shares outstanding 164 173 289 143
Weighted average number of common shares outstanding – basic 3,724 3,609 3,697 3,589
Potential common shares from non-vested stock awards and the assumed exercise of stock options 123 121 110 139
Weighted average common shares outstanding – diluted 3,847 3,730 3,807 3,728
Net income (loss) per share – basic (in Dollars per share) $ 0.11 $ 0.13 $ 0.10 $ 0.21
Net income (loss) per share – diluted (in Dollars per share) $ 0.11 $ 0.13 $ 0.09 $ 0.20