Detail of Selected Balance Sheet Accounts (Components of Inventories) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Sep. 30, 2014
Balance Sheet Related Disclosures [Abstract]
Raw materials, parts and subassemblies	$ 39,063	$ 35,349
Work-in-progress	1,558us-gaap_InventoryWorkInProcess	2,035us-gaap_InventoryWorkInProcess
Provision for excess and obsolete inventory	(4,886)us-gaap_InventoryValuationReserves	(4,569)us-gaap_InventoryValuationReserves
Total inventories	$ 35,735us-gaap_InventoryNet	$ 32,815us-gaap_InventoryNet

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Amount after valuation and LIFO reserves of inventory expected to be sold, or consumed within one year or operating cycle, if longer.

+ References

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- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

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Amount of valuation reserve for inventory.

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Amount before valuation and LIFO reserves of merchandise or goods in the production process expected to be completed within one year or operating cycle, if longer.

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