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Basis of Presentation Inventories (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Sep. 30, 2011
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Percentage of weighted average cost inventory	80.00%
Purchased parts and raw materials	$ 25,432	$ 24,925
Work-in-process	4,159	8,257
Finished goods	3,484	3,980
Inventory	$ 33,075	$ 37,162

Carrying amount, net of reserves and adjustments, as of the balance sheet date of merchandise or goods which are partially completed. This inventory is generally comprised of raw materials, labor and factory overhead costs, which require further materials, labor and overhead to be converted into finished goods, and which generally require the use of estimates to determine percentage complete and pricing.

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