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Selected Balance Sheet Data (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Sep. 30, 2011
Accounts receivable, net:
Accounts receivable	$ 24,984	$ 26,772
Less allowance for doubtful accounts	620	339
Accounts receivable, net	24,364	26,433
Inventories:
Raw materials	20,432	18,960
Work in process	448	653
Finished goods	5,422	4,373
Inventories	$ 26,302	$ 23,986

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Amounts due from customers or clients, within one year of the balance sheet date (or the normal operating cycle, whichever is longer) for goods or services (including trade receivables) that have been delivered or sold in the normal course of business.

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