Earning Per Share Data - Basic and Diluted Earnings Per Share (Detail) - USD ($)	3 Months Ended		9 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Earnings Per Share [Abstract]
Net income	$ 2,114,000	$ 266,000	$ 5,319,000	$ 354,000
Common Shares:
Weighted average common shares outstanding	9,555,000	9,521,000	9,547,000	9,521,000
Effect of dilutive stock options	139,000	66,000	111,000	67,000
Diluted shares outstanding	9,694,000	9,587,000	9,658,000	9,588,000
Basic:
Net earnings per share	$ 0.22	$ 0.03	$ 0.56	$ 0.04
Diluted:
Net earnings per share	$ 0.22	$ 0.03	$ 0.55	$ 0.04