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Balance Sheet Components (Details) (USD $) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Aug. 31, 2012 | May 31, 2012 | Aug. 31, 2011 | Aug. 31, 2012 | Aug. 31, 2011 | Aug. 31, 2010
Inventories |  |  |  |  |  |
Raw materials | $ 2,999,000 |  | $ 3,450,000 | $ 2,999,000 | $ 3,450,000 |
Work in process | 4,065,000 |  | 3,287,000 | 4,065,000 | 3,287,000 |
Finished goods | 5,952,000 |  | 9,480,000 | 5,952,000 | 9,480,000 |
Total | 13,016,000 |  | 16,217,000 | 13,016,000 | 16,217,000 |
Inventory write-down | 800,000 | 700,000 | 4,300,000 | 3,148,000 | 5,793,000 | 40,000
Property, Plant and Equipment |  |  |  |  |  |
Total property, plant and equipment | 86,706,000 |  | 77,011,000 | 86,706,000 | 77,011,000 |
Less: Accumulated depreciation, amortization and impairment | (40,064,000) |  | (25,207,000) | (40,064,000) | (25,207,000) |
Property, plant and equipment, net | 46,642,000 |  | 51,804,000 | 46,642,000 | 51,804,000 |
Property, plant and equipment pledged as collateral for notes payable and lines of credit | 9,900,000 |  | 12,800,000 | 9,900,000 | 12,800,000 |
Impairment of Long-Lived Assets |  |  |  |  |  |
Impairment of long-lived assets | 7,500,000 |  |  | 7,507,000 |  |
Buildings and improvements |  |  |  |  |  |
Property, Plant and Equipment |  |  |  |  |  |
Total property, plant and equipment | 14,501,000 |  | 12,924,000 | 14,501,000 | 12,924,000 |
Machinery and equipment |  |  |  |  |  |
Property, Plant and Equipment |  |  |  |  |  |
Total property, plant and equipment | 64,267,000 |  | 50,669,000 | 64,267,000 | 50,669,000 |
Leasehold improvements |  |  |  |  |  |
Property, Plant and Equipment |  |  |  |  |  |
Total property, plant and equipment | 3,143,000 |  | 3,123,000 | 3,143,000 | 3,123,000 |
Other equipment |  |  |  |  |  |
Property, Plant and Equipment |  |  |  |  |  |
Total property, plant and equipment | 2,249,000 |  | 2,136,000 | 2,249,000 | 2,136,000 |
Construction in progress |  |  |  |  |  |
Property, Plant and Equipment |  |  |  |  |  |
Total property, plant and equipment | $ 2,546,000 |  | $ 8,159,000 | $ 2,546,000 | $ 8,159,000 |

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