CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (USD $) In Thousands	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Loss
Beginning Balance at Sep. 30, 2012	$ 104,972	$ 134	$ 95,086	$ 9,786	$ (34)
Beginning Balance, shares at Sep. 30, 2012		13,370
Net income	3,842			3,842
Foreign currency translation adjustments	(7)				(7)
Cash dividends	(2,359)			(2,359)
Stock-based compensation	693	1	692
Stock-based compensation, shares		71
Exercise of stock options, net	322	1	321
Exercise of stock options, shares		79
Excess tax benefit from stock option exercises and restricted stock vesting	403		403
Repurchase and retirement of common stock	(532)	(1)	(531)
Repurchase and retirement of common stock, shares		(27)
Ending Balance at Dec. 31, 2012	107,334	135	95,971	11,269	(41)
Ending Balance, shares at Dec. 31, 2012		13,493
Beginning Balance at Sep. 30, 2013	122,633	136	98,634	23,930	(67)
Beginning Balance, shares at Sep. 30, 2013		13,556
Net income	4,259			4,259
Foreign currency translation adjustments	2				2
Cash dividends	(2,565)			(2,565)
Stock-based compensation	784	1	783
Stock-based compensation, shares		67
Exercise of stock options, net	206	1	205
Exercise of stock options, shares		109
Excess tax benefit from stock option exercises and restricted stock vesting	1,130		1,130
Repurchase and retirement of common stock	(1,657)	(1)	(1,656)
Repurchase and retirement of common stock, shares		(52)
Ending Balance at Dec. 31, 2013	$ 124,792	$ 137	$ 99,096	$ 25,624	$ (65)
Ending Balance, shares at Dec. 31, 2013		13,680