Consolidated Statement of Changes in Stockholders' Equity (unaudited) - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Retained Earnings	Unearned Deferred Compensation	Accumulated Other Comprehensive Income (Loss)
Beginning balance at Sep. 30, 2015						$ (214)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock options exercised (in shares)	43,515
Ending balance (in shares) at Sep. 30, 2016		5,260,098
Ending balance at Sep. 30, 2016	$ 64,544	$ 53	$ 54,963	$ 9,107	$ (193)	614
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	2,957			2,957
Other comprehensive loss, net of tax	(753)					(753)
Surrender of restricted shares of common stock (in shares)		(1,375)
Surrender of restricted shares of common stock	(17)		(17)
Common stock awarded under the equity incentive plan (in shares)		5,500
Common stock awarded under the equity incentive plan	0		69		(69)
Common stock repurchased (in shares)		(1,428)
Common stock repurchased	$ (16)		(16)
Common stock options exercised (in shares)	8,100	8,100
Common stock options exercised	$ 67		67
Stock option expense	23		23
Amortization of restricted stock	48				48
Cash dividends ($0.16 per share)	(843)			(843)
Ending balance (in shares) at Jun. 30, 2017		5,270,895
Ending balance at Jun. 30, 2017	$ 66,010	$ 53	$ 55,089	$ 11,221	$ (214)	$ (139)