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Detail Of Selected Balance Sheet Accounts (Components Of Inventories) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Sep. 30, 2012
Detail Of Selected Balance Sheet Accounts [Abstract]
Raw materials, parts and subassemblies	$ 34,136	$ 33,632
Work-in-progress	4,770	6,422
Provision for excess and obsolete inventory	(6,660)	(7,137)
Total inventories	$ 32,246	$ 32,917

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Carrying amount (lower of cost or market) as of the balance sheet date of inventories less all valuation and other allowances. Excludes noncurrent inventory balances (expected to remain on hand past one year or one operating cycle, if longer).

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Gross amount of unprocessed materials to be used in manufacturing or production process and supplies that will be consumed.

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The amount of the valuation account as of the balance sheet date which reduces the carrying amount of inventory to net realizable value; takes into consideration such factors as market value, excessive quantities based on expected sales, technological obsolescence, and shrinkage. May also provide for estimated product returns or price concessions pertaining to product cost.

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Gross amount of merchandise or goods which are partially completed, are generally comprised of raw materials, labor and factory overhead costs, and 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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