Property, Plant, and Equipment, net (Other Disclosures) (Details) (USD $)	1 Months Ended	12 Months Ended
	May 31, 2012	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2010
Extraordinary Item [Line Items]
Acquisition of equipment under capital lease		$ 4,411,000	$ 1,879,000	$ 0
Equipment sold to SEI	900,000
Accumulated depreciation, depletion and amortization		74,500,000	105,500,000
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		$ 4,400,000