Purchased Intangible Assets (Schedule of Finite-Lived Intangible Assets by Major Class) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Sep. 30, 2011
Finite-Lived Intangible Assets [Line Items]
Total	$ 7,826
Gross	9,120	12,725
Accumulated Amortization	894	1,644
Total, net	8,226	11,081
Developed technology
Finite-Lived Intangible Assets [Line Items]
Gross	4,930	6,760
Accumulated Amortization	879	1,028
Total	4,051	5,732
In-process technology (IPR&D)
Finite-Lived Intangible Assets [Line Items]
Gross	400	1,595
Accumulated Amortization	0	0
Total	400	1,595
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Gross	3,340	3,800
Accumulated Amortization	9	506
Total	3,331	3,294
Other
Finite-Lived Intangible Assets [Line Items]
Gross	450	570
Accumulated Amortization	6	110
Total	$ 444	$ 460