Statements of Changes in Stockholders' Equity (USD $) In Thousands, except Share data	Total	Common Stock [Member]	Retained Earnings [Member]	Other Comprehensive Loss [Member]
Beginning balance at Sep. 30, 2012	$ 25,224	$ 9,584	$ 15,748	$ (108)
Beginning balance, Shares at Sep. 30, 2012		5,759,857
Net income	4,820		4,820
Dividends paid	(729)		(729)
Reclassification from sale of investment in available for sale security	108			108
Employee and director stock options exercised	911	911
Employee and director stock options exercised, Shares	(247,440)	247,440
Repurchase of employee and director stock options to pay for option exercise	(671)	(671)
Repurchase of employee and director stock options to pay for option exercise, Shares		(95,802)
Repurchase of employee stock to pay for option exercise	(181)	(181)
Repurchase of employee stock to pay for option exercise, Shares		(24,866)
Employee and director restricted stock vested	0
Employee and director restricted stock vested, Shares		12,350
Repurchase of vested employee restricted stock for tax withholding	(1)	(1)
Repurchase of vested employee restricted stock for tax withholding, Shares		(223)
Deferred restricted stock unit compensation	8	8
Tax effect of restricted stock unit vesting and stock option exercises	298	298
Ending balance at Sep. 30, 2013	29,787	9,948	19,839
Ending balance, shares at Sep. 30, 2013		5,898,756
Net income	7,667		7,667
Dividends paid	(898)		(898)
Employee and director stock options exercised	1,318	1,318
Employee and director stock options exercised, Shares	(185,998)	186,004
Repurchase of employee and director stock options to pay for option exercise	(900)	(900)
Repurchase of employee and director stock options to pay for option exercise, Shares		(69,227)
Repurchase of employee stock to pay for option exercise	(104)	(104)
Repurchase of employee stock to pay for option exercise, Shares		(6,757)
Employee and director restricted stock vested	0
Employee and director restricted stock vested, Shares		15,000
Repurchase of vested employee restricted stock for tax withholding	(85)	(39)	(46)
Repurchase of vested employee restricted stock for tax withholding, Shares		(4,500)
Deferred restricted stock unit compensation	202	202
Tax effect of restricted stock unit vesting and stock option exercises	427	427
Ending balance at Sep. 30, 2014	$ 37,414	$ 10,852	$ 26,562
Ending balance, shares at Sep. 30, 2014		6,019,276