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Property, Plant, and Equipment, net - Other Disclosures (Details) (USD $)	9 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	May 07, 2012	Sep. 30, 2011
Equipment, write-down, damaged by Thailand flood	$ 1,800,000
Equipment under capital lease, write-down, damaged by Thailand flood	1,900,000
Acquisition of equipment under capital lease	3,722,000	0
Capital lease obligations	2,924,000			1,279,000
Equipment sold to SEI			900,000
Accumulated depreciation, depletion and amortization	$ 75,100,000			$ 105,500,000

The cumulative amount of depreciation, depletion and amortization (related to property, plant and equipment, but not including land) that has been recognized in the income statement.

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- Definition

Amount equal to the present value (the principal) at the beginning of the lease term of minimum lease payments during the lease term (excluding that portion of the payments representing executory costs such as insurance, maintenance, and taxes to be paid by the lessor, together with any profit thereon) net of payments or other amounts applied to the principal, through the balance sheet date and due to be paid within one year (or one operating cycle, if longer) of the balance sheet date.

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