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Selected Balance Sheet Data (Details) (USD $) In Thousands, unless otherwise specified | Sep. 30, 2014 | Sep. 30, 2013 | Sep. 30, 2012
--- | --- | --- | ---
Accounts receivable, net: |  |  |
Accounts receivable | $ 28,943 | $ 27,142 |
Less allowance for doubtful accounts | 367 | 313 |
Total accounts receivable, net | 28,576 | 26,829 |
Inventories: |  |  |
Raw materials | 26,402 | 21,171 |
Work in process | 315 | 224 |
Finished goods | 4,530 | 4,745 |
Total Inventories | 31,247 | 26,140 |
Property, Plant and Equipment, Net |  |  |
Total property, equipment and improvements, gross | 35,424 | 45,951 |
Less accumulated depreciation and amortization | 22,193 | 32,041 |
Total property, equipment and improvements, net | 13,231 | 13,910 | 15,157
Land |  |  |
Property, Plant and Equipment, Net |  |  |
Total property, equipment and improvements, gross | 1,800 | 1,800 |
Buildings |  |  |
Property, Plant and Equipment, Net |  |  |
Total property, equipment and improvements, gross | 10,522 | 10,522 |
Improvements |  |  |
Property, Plant and Equipment, Net |  |  |
Total property, equipment and improvements, gross | 3,420 | 3,863 |
Equipment |  |  |
Property, Plant and Equipment, Net |  |  |
Total property, equipment and improvements, gross | 13,646 | 14,989 |
Purchased Software |  |  |
Property, Plant and Equipment, Net |  |  |
Total property, equipment and improvements, gross | 3,559 | 12,296 |
Furniture and Fixtures |  |  |
Property, Plant and Equipment, Net |  |  |
Total property, equipment and improvements, gross | $ 2,477 | $ 2,481 |

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