Consolidated Statements of Stockholders Equity (USD $) In Thousands, except Share data	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Retained Earnings [Member]
Beginning balance at Sep. 30, 2010	$ 155,603	$ 871	$ 69,702	$ 886	$ 84,144
Beginning balance, shares at Sep. 30, 2010		17,424,000
Net income	(18,506)				(18,506)
Other comprehensive income, net of tax	(1,039)			(1,039)
Issuance of common stock	574	3	571
Issuance of common stock, shares		55,000
Common stock options exercised, net, shares	0
Purchase of common stock to pay employee taxes	(40)	3	(43)
Purchase of common stock to pay employee taxes, shares		52,000
Excess tax benefit from stock-based compensation plans	8		8
Stock-based compensation	4,252		4,252
Ending balance at Sep. 30, 2011	140,852	877	74,490	(153)	65,638
Ending balance, shares at Sep. 30, 2011		17,531,000
Net income	10,231				10,231
Other comprehensive income, net of tax	193			193
Issuance of common stock	271	1	270
Issuance of common stock, shares		26,000
Common stock repurchased	(54,991)	(145)	(54,846)
Common stock repurchased, shares	(2,894,253)	(2,894,000)
Common stock options exercised, net	73	1	72
Common stock options exercised, net, shares	11,379	10,000
Purchase of common stock to pay employee taxes	(236)	(1)	(235)
Purchase of common stock to pay employee taxes, shares		(16,000)
Excess tax benefit from stock-based compensation plans	(4,138)		(4,138)
Stock-based compensation	2,733		2,733
Ending balance at Sep. 30, 2012	94,988	733	18,346	40	75,869
Ending balance, shares at Sep. 30, 2012		14,657,000
Net income	15,167				15,167
Other comprehensive income, net of tax	18			18
Issuance of common stock	275	1	274
Issuance of common stock, shares		20,000
Common stock repurchased	(18,809)	(40)	(18,769)
Common stock repurchased, shares	(795,643)	(796,000)
Common stock options exercised, net	144	1	143
Common stock options exercised, net, shares	10,273	10,000
Purchase of common stock to pay employee taxes	(41)		(41)
Purchase of common stock to pay employee taxes, shares
Excess tax benefit from stock-based compensation plans	(477)		(477)
Stock-based compensation	2,552		2,552
Ending balance at Sep. 30, 2013	$ 93,817	$ 695	$ 2,028	$ 58	$ 91,036
Ending balance, shares at Sep. 30, 2013		13,891,000