Consolidated Statements of Operations and Comprehensive Income (Loss) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
Income Statement [Abstract]
Revenue	$ 168,147	$ 163,781	$ 200,928
Cost of revenue	139,949	145,955	158,165
Gross profit	28,198	17,826	42,763
Operating expense (income):
Selling, general, and administrative	27,419	34,861	35,582
Research and development	19,972	22,338	32,853
Impairment	0	1,425	8,000
Litigation settlements, net	0	1,050	(1,145)
Flood-related loss	0	5,519	0
Flood-related insurance proceeds	(19,000)	(9,000)	0
Gain on sale of assets	(413)	(2,742)	0
Total operating expense	27,978	53,451	75,290
Operating income (loss)	220	(35,625)	(32,527)
Other income (expense):
Interest expense, net	(800)	(677)	(640)
Foreign exchange gain	356	45	735
Loss from equity method investment	0	(1,201)	(1,842)
Gain on sale of equity method investment	4,800	0	0
Change in fair value of financial instruments	515	(69)	70
Other income (expense)	17	0	(15)
Total other income (expense)	4,888	(1,902)	(1,692)
Income (loss) before income tax expense	5,108	(37,527)	(34,219)
Income tax expense	(120)	(1,644)	0
Net income (loss)	4,988	(39,171)	(34,219)
Foreign exchange translation adjustment	247	464	135
Comprehensive income (loss)	$ 5,235	$ (38,707)	$ (34,084)
Per share data:
Net income (loss) per basic share (in dollars per share)	$ 0.19	$ (1.66)	$ (1.54)
Net income (loss) per diluted share (in dollars per share)	$ 0.19	$ (1.66)	$ (1.54)
Weighted-average number of basic shares outstanding	26,531	23,559	22,228
Weighted-average number of diluted shares outstanding	26,812	23,559	22,228