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Selected Balance Sheet Data (Details) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2013 | Sep. 30, 2013
--- | --- | ---
Accounts receivable, net: |  |
Accounts receivable | $ 24,220 | $ 27,142
Less allowance for doubtful accounts | 432 | 313
Accounts receivable, net | 23,788 | 26,829
Inventories: |  |
Raw materials | 25,545 | 21,171
Work in process | 264 | 224
Finished goods | 4,670 | 4,745
Inventories | $ 30,479 | $ 26,140

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