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Selected Balance Sheet Data (Details) - USD ($) $ in Thousands | Jun. 30, 2015 | Sep. 30, 2014
--- | --- | ---
Accounts receivable, net: |  |
Accounts receivable | $ 24,812 | $ 28,943
Less allowance for doubtful accounts | 397 | 367
Accounts receivable, net | 24,415 | 28,576
Inventories: |  |
Raw materials | 28,043 | 26,402
Work in process | 615 | 315
Finished goods | 6,032 | 4,530
Inventories | $ 34,690 | $ 31,247

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