Purchased Intangible Assets (Schedule of Current Finite-Lived Intangible Asset Amortization Expense by Income Statement Line Item) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2015	Mar. 31, 2014
Schedule of Current Intangible Asset Amortization Expense By Income Statement Line Item [Line Items]
Amortization of intangibles	$ 347	$ 409	$ 694	$ 818
Cost of sales
Schedule of Current Intangible Asset Amortization Expense By Income Statement Line Item [Line Items]
Amortization of intangibles	170	233	341	465
Operating expenses
Schedule of Current Intangible Asset Amortization Expense By Income Statement Line Item [Line Items]
Amortization of intangibles	$ 177	$ 176	$ 353	$ 353