Summary of Significant Accounting Policies Change in Accounting Estimate (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2013
Change in Accounting Estimate [Line Items]
Write-down of inventory	$ 138	$ 294	$ 3,652
Inventory Valuation and Obsolescence
Change in Accounting Estimate [Line Items]
Write-down of inventory	$ 100	$ 300	3,700
Decrease (Increase) In Operating Income (Loss) Attributable To Parent			$ 3,700
Earnings Per Share Basic And Diluted Increase (Decrease)	$ 0.01	$ 0.03	$ 0.39