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Nature of Operations and Summary of Significant Accounting Policies - Basic and Diluted Earnings (Loss) per Share (Detail) - USD ($)		12 Months Ended
		Sep. 30, 2016	Sep. 30, 2015
Earnings Per Share [Abstract]
Net income		$ 7,043,000	$ (1,819,000)
Net Income Diluted		$ 7,043,000	$ (1,819,000)
Weighted average common shares outstanding		14,334,000	14,283,000
Common Stock Equivalents		190,000	0
Diluted shares outstanding		14,524,000	14,283,000
Basic earnings per common share:
Basic earnings per share	[1]	$ 0.49	$ (0.13)
Diluted earnings per common share:
Diluted earnings per share	[1]	$ 0.48	$ (0.13)
[1] Adjusted for three-for-two stock split

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The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of share based payment arrangements using the treasury stock method.

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