Impact from Thailand Flood (Details) (USD $)	1 Months Ended			12 Months Ended
	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
Capital Lease Obligations
Acquisition of equipment under capital lease				$ 0	$ 4,411,000	$ 1,879,000
Natural Disasters and Other Casualty Events
Asset Write-downs
Inventory, damaged by Thailand flood, loss (recovery)					3,700,000
Equipment, write-down, damaged by Thailand flood					1,800,000
Equipment under capital lease, write-down, damaged by Thailand flood						1,900,000
Loss on Inventory Purchase Commitments
Loss on inventory purchase commitments					1,600,000
Capital Lease Obligations
Property, plant and equipment, additions					5,200,000
Acquisition of equipment under capital lease				1,200,000	4,400,000
Insurance Recoveries, To Date
Insurance proceeds payment, from contract manufacturer	14,800,000	4,200,000	4,000,000
Insurance proceeds payment, from contract manufacturer, receivable	8,200,000
Insurance proceeds payment, from contract manufacturer, forgiveness of capital lease obligations	3,400,000	2,200,000
Insurance proceeds payment, from contract manufacturer, outstanding payables	3,200,000	2,000,000
Insurance proceeds payment, from company policy					$ 5,000,000