Summary of Significant Accounting Policies Change in Accounting Estimate (Details) (USD $)	12 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2012
Change in Accounting Estimate [Line Items]
Losses on inventory purchase commitments	$ 0	$ 0	$ 2,455,000
Write-down of inventory	294,000	3,652,000	10,380,000
Inventory Valuation and Obsolescence
Change in Accounting Estimate [Line Items]
Losses on inventory purchase commitments			2,455,000
Decrease (Increase) In Operating Income (Loss) Including Portion Attributable To Noncontrolling Interest			12,800,000
Decrease (Increase) In Operating Income (Loss) Attributable To Parent		3,700,000	9,700,000
Earnings Per Share Basic And Diluted Increase (Decrease)	$ 0.03	$ 0.39	$ 1.01
Write-down of inventory	$ 300,000	$ 3,652,000	$ 10,380,000