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Earnings Per Share of Common Stock (Detail) - Basic and diluted earnings per share computations - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 6 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Mar. 31, 2018
Mar. 31, 2017
Earnings Per Share [Abstract]        
Weighted Average Number Diluted Shares Outstanding Adjustment 168,000   169,000  
Net income (loss) $ (594) $ 428 $ (1,794) $ 385
Less: Net income attributable to nonvested common stock (in Dollars) 0 18 0 28
Net income attributable to common stockholders (in Dollars) $ (594) $ 410 $ (1,794) $ 357
Weighted average total shares outstanding – basic 3,823,000 3,888,000 3,795,000 3,986,000
Less: weighted average non-vested shares outstanding 0 164,000 0 289,000
Weighted average number of common shares outstanding – basic 3,823,000 3,724,000 3,795,000 3,697,000
Potential common shares from non-vested stock awards and the assumed exercise of stock options 0 123,000 0 110,000
Weighted average common shares outstanding – diluted 3,823,000 3,847,000 3,795,000 3,807,000
Net income (loss) per share – basic (in Dollars per share) $ (0.16) $ 0.11 $ (0.47) $ 0.10
Net income (loss) per share – diluted (in Dollars per share) $ (0.16) $ 0.11 $ (0.47) $ 0.09