Earnings Per Share - Computation of Diluted Earnings Per Share (Detail) - shares	12 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Earnings Per Share [Abstract]
Weighted average common stock outstanding	5,887,396	5,856,309
Common stock equivalents - stock options and RSU's	73,293	40,424
Total diluted earning per shares	5,960,689	5,896,733