| Balance Sheet Related Disclosures [Abstract] | Period [Axis] | 
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2011-07-01 - 2012-06-30  | 
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Balance Sheet Related Disclosures [Abstract]  |    | 
Schedule of Accounts, Notes, Loans and Financing Receivable  | Accounts receivable  |   |  |  |  |  |  |  |  |     | June 30,    |     | 2012  |    | 2011  |     | (in thousands)  |  Accounts receivable  | $  | 55,858  | 
 
  |    | $  | 61,768  | 
 
  |  Less: Allowance for price adjustments  | (16,256  | )  |    | (19,235  | )  |  Less: Allowance for doubtful accounts  | (752  | )  |    | (30  | )  |  Accounts receivable, net  | $  | 38,850  | 
 
  |    | $  | 42,503  | 
 
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Schedule of Inventory, Current  | Inventories   |   |  |  |  |  |  |  |  |     | June 30,   |     | 2012  |    | 2011  |     | (in thousands)  |  Raw materials  | $  | 27,856  | 
 
  |    | $  | 30,713  | 
 
  |  Work in-process  | 28,188  | 
 
  |    | 20,513  | 
 
  |  Finished goods  | 9,734  | 
 
  |    | 14,025  | 
 
  |     | $  | 65,778  | 
 
  |    | $  | 65,251  | 
 
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Property, Plant and Equipment  | Depreciation is provided for on a straight-line basis over the estimated useful lives of the related assets as follows:   |   |  |  |  Building  |    | 20 years  |  Manufacturing machinery and equipment  |    | 3 to 10 years  |  Equipment and tooling  |    | 5 years  |  Computer equipment and software  |    | 3 years  |  Office furniture and equipment  |    | 5 years  |  Leasehold improvements  |    | 2  to 15 years based on shorter of expected economic useful life or the lease term  |  
  Property, plant and equipment  |   |  |  |  |  |  |  |  |     | June 30,    |     | 2012  |    | 2011  |     | (in thousands)  |  Land  | $  | 4,950  | 
 
  |    | $  | —  | 
 
  |  Building  | 4,077  | 
 
  |    | —  | 
 
  |  Manufacturing machinery and equipment  | 152,307  | 
 
  |    | 107,555  | 
 
  |  Equipment and tooling  | 9,910  | 
 
  |    | 9,232  | 
 
  |  Computer equipment and software  | 14,912  | 
 
  |    | 11,906  | 
 
  |  Office furniture and equipment  | 1,630  | 
 
  |    | 1,597  | 
 
  |  Leasehold improvements  | 22,463  | 
 
  |    | 15,949  | 
 
  |     | 210,249  | 
 
  |    | 146,239  | 
 
  |  Less accumulated depreciation  | (63,114  | )  |    | (38,617  | )  |     | 147,135  | 
 
  |    | 107,622  | 
 
  |  Equipment and construction in progress  | 11,408  | 
 
  |    | 20,217  | 
 
  |  Property, plant and equipment, net  | $  | 158,543  | 
 
  |    | $  | 127,839  | 
 
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Schedule of Finite-Lived Intangible Assets  |  Intangible assets with finite lives are amortized on a straight-line basis over the estimated periods of benefit, as follows:   |   |  |  |  Patents and exclusive technology rights  |    | 3 to 7 years  |  Trade name  |    | 3 years  |  Customer relationships  |    | 4 years  |  
 Intangible assets  |   |  |  |  |  |  |  |  |     | June 30,    |     | 2012  |    | 2011  |     | (in thousands)  |  Patents and exclusive technology rights  | $  | 1,566  | 
 
  |    | $  | 1,566  | 
 
  |  Trade name  | 250  | 
 
  |    | 250  | 
 
  |  Customer relationships  | 1,150  | 
 
  |    | 1,150  | 
 
  |     | 2,966  | 
 
  |    | 2,966  | 
 
  |  Less accumulated amortization  | (1,938  | )  |    | (1,367  | )  |  Intangible assets, net  | $  | 1,028  | 
 
  |    | $  | 1,599  | 
 
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Schedule of Finite-Lived Intangible Assets, Future Amortization Expense  | Future minimum amortization expense of intangible assets is as follows:  |   |  |  |  |  Year ending June 30,  | (in thousands)  |  2013  | $  | 532  | 
 
  |  2014  | 365  | 
 
  |  2015  | 131  | 
 
  |     | $  | 1,028  | 
 
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Schedule of Goodwill  | Goodwill 
 
 The changes in the carrying value of goodwill is as follows (in thousands):  |   |  |  |  |     | (in thousands)  |  Balance at June 30, 2011  | $  | —  | 
 
  |  Addition: Oregon Fab acquisition  | 269  | 
 
  |  Balance at June 30, 2012  | $  | 269  | 
 
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Schedule of Other Assets, Noncurrent  | Other long term assets  |   |  |  |  |  |  |  |  |     | June 30,    |     | 2012  |    | 2011  |     | (in thousands)  |  Deposit for acquisition of wafer fabrication assets  | $  | —  | 
 
  |    | $  | 5,000  | 
 
  |  Prepayments for property and equipment  | 1,632  | 
 
  |    | 2,086  | 
 
  |  Investment in a privately held company  | 100  | 
 
  |    | —  | 
 
  |  Deferred debt issuance cost  | 204  | 
 
  |    | —  | 
 
  |  Office leases deposits  | 539  | 
 
  |    | 521  | 
 
  |     | $  | 2,475  | 
 
  |    | $  | 7,607  | 
 
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Schedule of Accrued Liabilities  | Accrued liabilities  |   |  |  |  |  |  |  |  |     | June 30,    |     | 2012  |    | 2011  |     | (in thousands)  |  Accrued salaries and wages  | $  | 3,418  | 
 
  |    | $  | 2,322  | 
 
  |  Accrued vacation  | 2,232  | 
 
  |    | 1,383  | 
 
  |  Accrued bonuses  | 4,258  | 
 
  |    | 3,760  | 
 
  |  Warranty accrual  | 1,556  | 
 
  |    | 664  | 
 
  |  Stock rotation accrual  | 2,032  | 
 
  |    | 1,880  | 
 
  |  Accrued professional fees  | 687  | 
 
  |    | 1,101  | 
 
  |  ESPP payable  | 313  | 
 
  |    | 206  | 
 
  |  Customer deposits  | 179  | 
 
  |    | 204  | 
 
  |  Other accrued expenses  | 6,351  | 
 
  |    | 3,603  | 
 
  |     | $  | 21,026  | 
 
  |    | $  | 15,123  | 
 
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Schedule of Product Warranty Liability  | Warranty accrual, included in accrued liabilities is as follows:  |   |  |  |  |  |  |  |  |  |  |  |  |     | Year Ended June 30,  |     | 2012  |    | 2011  |    | 2010  |     | (in thousands)  |  Beginning balance  | $  | 664  | 
 
  |    | $  | 1,275  | 
 
  |    | $  | 1,094  | 
 
  |  Addition  | 1,617  | 
 
  |    | 186  | 
 
  |    | 929  | 
 
  |  Utilization  | (725  | )  |    | (797  | )  |    | (748  | )  |  Ending balance  | $  | 1,556  | 
 
  |    | $  | 664  | 
 
  |    | $  | 1,275  | 
 
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Stock Rotation Accrual  | Stock rotation accrual, included in accrued liabilities is as follows:  |   |  |  |  |  |  |  |  |  |  |  |  |     | Year Ended June 30,  |     | 2012  |    | 2011  |    | 2010  |     | (in thousands)  |  Beginning balance  | $  | 1,880  | 
 
  |    | $  | 513  | 
 
  |    | $  | 1,144  | 
 
  |  Addition  | 5,166  | 
 
  |    | 5,520  | 
 
  |    | 2,556  | 
 
  |  Utilization  | (5,014  | )  |    | (4,153  | )  |    | (3,187  | )  |  Ending balance  | $  | 2,032  | 
 
  |    | $  | 1,880  | 
 
  |    | $  | 513  | 
 
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Deferred Revenue, by Arrangement, Disclosure  | Deferred margin  Deferred margin consists of the following:  |   |  |  |  |  |  |  |  |     | June 30,  |     | 2012  |    | 2011  |  Deferred revenue  | $  | 558  | 
 
  |    | $  | 752  | 
 
  |  Deferred costs  | (192  | )  |    | (257  | )  |  Deferred margin  | $  | 366  | 
 
  |    | $  | 495  | 
 
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Schedule of Captial Lease  | Capital leases Capital lease liabilities include the following:  |   |  |  |  |  |  |  |  |     | June 30,  |     | 2012  |    | 2011  |  Computer software  | $  | 1,916  | 
 
  |    | $  | 292  | 
 
  |  Exclusive technology rights  | 130  | 
 
  |    | 144  | 
 
  |     | 2,046  | 
 
  |    | 436  | 
 
  |  Less current portion  | (961  | )  |    | (306  | )  |  Capital leases - long-term portion  | $  | 1,085  | 
 
  |    | $  | 130  | 
 
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Schedule of Future Minimum Lease Payments for Capital Leases  | Future minimum lease payments at June 30, 2012 are as follows:  |   |  |  |  |  Year ending June 30,  | (in thousands)  |  2013  | $  | 1,025  | 
 
  |  2014  | 1,025  | 
 
  |  2015  | 25  | 
 
  |  2016  | 25  | 
 
  |  2017  | 25  | 
 
  |  Thereafter  | 50  | 
 
  |  Total minimum lease payments  | 2,175  | 
 
  |  Less amount representing interest  | (129  | )  |  Total capital lease liabilities  | $  | 2,046  | 
 
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