Condensed Consolidated Statements of Operations and Comprehensive (Loss) Income (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Income Statement [Abstract]
Revenue	$ 44,211	$ 49,306
Cost of revenue	34,076	38,358
Gross profit	10,135	10,948
Operating expense (income):
Selling, general, and administrative	7,972	6,904
Research and development	4,403	5,390
Flood-related insurance proceeds	0	(4,192)
Total operating expense	12,375	8,102
Operating (loss) income	(2,240)	2,846
Other income (expense):
Interest expense, net	(126)	(238)
Foreign exchange gain	100	101
Gain on sale of investment	290	0
Change in fair value of financial instruments	(78)	237
Total other income	186	100
(Loss) income before income tax expense	(2,054)	2,946
Income tax expense	0	(120)
Net (loss) income	(2,054)	2,826
Foreign exchange translation adjustment	45	69
Comprehensive (loss) income	$ (2,009)	$ 2,895
Per share data:
Net (loss) income per basic share (in dollars per share)	$ (0.07)	$ 0.11
Net (loss) income per diluted share (in dollars per share)	$ (0.07)	$ 0.11
Weighted-average number of basic shares outstanding	29,938	25,977
Weighted-average number of diluted shares outstanding	29,938	26,236