Consolidated Statements of Shareholders' Equity (USD $) In Thousands, except Share data, unless otherwise specified	Total	Common Stock	Treasury Stock	Accumulated Other Comprehensive Income	Accumulated Deficit
Beginning Balance at Sep. 30, 2011	$ 98,436	$ 713,063	$ (2,083)	$ 912	$ (613,456)
Beginning Balance (in shares) at Sep. 30, 2011		23,481,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(39,171)				(39,171)
Translation adjustment	464			464
Stock-based compensation (in shares)		603,000
Stock-based compensation	8,038	8,038
Stock options exercised (in shares)		17,000
Stock options exercised	75	75
Issuance of common stock - ESPP (in shares)		250,000
Issuance of common stock - ESPP	1,091	1,091
Issuance of common stock - ODPP (in shares)	21,000	21,000
Issuance of common stock - ODPP	90	90
Issuance of treasury stock (in shares)		0
Issuance of treasury stock	0	(12)	12
Ending Balance at Sep. 30, 2012	69,023	722,345	(2,071)	1,376	(652,627)
Ending Balance (in shares) at Sep. 30, 2012		24,372,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	4,988				4,988
Translation adjustment	247			247
Stock-based compensation (in shares)		475,000
Stock-based compensation	4,027	4,027
Stock options exercised (in shares)		79,000
Stock options exercised	395	395
Issuance of common stock - ESPP (in shares)		344,000
Issuance of common stock - ESPP	1,292	1,292
Issuance of common stock - ODPP (in shares)	4,500	5,000
Issuance of common stock - ODPP	18	18
Issuance of common stock from stock sales (in shares)		4,707,000
Issuance of common stock from stock sales	21,189	21,189
Ending Balance at Sep. 30, 2013	101,179	749,266	(2,071)	1,623	(647,639)
Ending Balance (in shares) at Sep. 30, 2013	29,982,000	29,982,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	4,852				4,852
Translation adjustment	214			214
Stock-based compensation (in shares)		633,000
Stock-based compensation	4,074	4,074
Stock options exercised (in shares)	120,761	120,000
Stock options exercised	573	573
Issuance of common stock - ESPP (in shares)		341,000
Issuance of common stock - ESPP	1,182	1,182
Issuance of common stock - ODPP (in shares)	1,600	2,000
Issuance of common stock - ODPP	8	8
Issuance of common stock - BOD (in shares)		31,000
Issuance of common stock - BOD	265	265
Ending Balance at Sep. 30, 2014	$ 112,347	$ 755,368	$ (2,071)	$ 1,837	$ (642,787)
Ending Balance (in shares) at Sep. 30, 2014	31,109,000	31,109,000