Property, Plant, and Equipment, net (Other Disclosures) (Details) (USD $)	1 Months Ended	12 Months Ended				1 Months Ended			12 Months Ended
	May 31, 2012	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011	Jun. 30, 2012	Mar. 31, 2013 Natural Disasters and Other Casualty Events	Dec. 31, 2012 Natural Disasters and Other Casualty Events	Sep. 30, 2012 Natural Disasters and Other Casualty Events	Sep. 30, 2013 Natural Disasters and Other Casualty Events	Sep. 30, 2012 Natural Disasters and Other Casualty Events	Sep. 30, 2011 Natural Disasters and Other Casualty Events
Extraordinary Item [Line Items]
Equipment, write-down, damaged by Thailand flood										$ 1,800,000
Equipment under capital lease, write-down, damaged by Thailand flood											1,900,000
Capitalized cost of new manufacturing lines										5,200,000
Acquisition of equipment under capital lease		0	4,411,000	1,879,000					1,200,000	4,400,000
Insurance proceeds payment, from contract manufacturer						14,800,000	4,200,000	4,000,000
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 contract manufacturer, receivable						8,200,000
Equipment sold to SEI	900,000
Accumulated depreciation, depletion and amortization		$ 79,900,000			$ 74,500,000