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The Company and Summary of Significant Accounting Policies (Details) (USD $) | 12 Months Ended
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Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
The Company and Summary of Significant Accounting Policies [Abstract] |  |  |
Percentage of pure gallium products produces by joint ventures (in hundredths) | 99.99% |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Reclassified from other income (expense) to equity in earnings | $ 1,281,000 | $ 741,000 | $ 259,000
Accounts Receivable and Allowance for Doubtful Accounts and Sales Returns [Line Items] |  |  |
Minimum period to evaluate receivable from US customer | 90 days |  |
Minimum period to evaluate receivable from other than US customer | 120 days |  |
Accounts receivable, net | 17,912,000 | 17,966,000 | 23,100,000
Valuation allowance balance |  |  | 856,000
Warranty Reserve [Abstract] |  |  |
Accrued product warranties | 588,000 | 1,003,000 | 740,000
Impairment of Long Lived Assets [Abstract] |  |  |
Impairment of long-lived assets | 0 | 0 | 0
Segment Reporting [Abstract] |  |  |
Number of operating segments | 1 |  |
Advertising Costs [Abstract] |  |  |
Advertising costs | 19,000 | 16,000 | 83,000
Computers and Software [Member] |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Property, plant and equipment, estimated economic life | 3 years |  |
Office Equipment [Member] |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Property, plant and equipment, estimated economic life | 3 years |  |
Furniture and Fixtures [Member] |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Property, plant and equipment, estimated economic life | 3 years |  |
Automobiles [Member] |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Property, plant and equipment, estimated economic life | 5 years |  |
Leasehold and Building Improvements [Member] |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Property, plant and equipment, estimated economic life | 10 years |  |
Building [Member] |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Property, plant and equipment, estimated economic life | 27 years 6 months |  |
Allowance for Doubtful Accounts [Member] |  |  |
Accounts Receivable and Allowance for Doubtful Accounts and Sales Returns [Line Items] |  |  |
Allowance deductions |  | 99,000 | 64,000
Allowance for Sales Returns [Member] |  |  |
Accounts Receivable and Allowance for Doubtful Accounts and Sales Returns [Line Items] |  |  |
Allowance deductions | 426,000 | 144,000 | 518,000
Additional allowance for sales return | 547,000 | (194,000) | 124,000
Valuation allowance balance | $ 245,000 | $ 124,000 | $ 462,000
Major Customer One [Member] |  |  |
Revenue, Major Customer [Line Items] |  |  |
Number of customers representing significant revenue | 1 | 1 |
Percentage of revenue generated by major customers (in hundredths) | 17.00% | 18.00% | 19.00%
Number of customers who accounted for 10% or more share in trade accounts receivable | 1 |  |
Percentage of trade accounts receivable accounted by major customer (in hundredths) | 28.00% | 33.00% |
Major Customer Two [Member] |  |  |
Revenue, Major Customer [Line Items] |  |  |
Number of customers representing significant revenue | 1 | 1 |
Top Five Major Customers [Member] |  |  |
Revenue, Major Customer [Line Items] |  |  |
Number of customers representing significant revenue | 5 | 5 | 5
Percentage of revenue generated by major customers (in hundredths) | 37.00% | 35.00% | 40.00%
Minimum [Member] |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Property, plant and equipment, estimated economic life | 3 years |  |
Minimum [Member] | Joint Ventures [Member] |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Percentage of ownership, equity method (in hundredths) | 20.00% |  |
Minimum [Member] | Majority-owned Subsidiaries [Member] |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Percentage of ownership, equity method (in hundredths) | 20.00% |  |
Maximum [Member] |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Property, plant and equipment, estimated economic life | 27 years 6 months |  |
Maximum [Member] | Joint Ventures [Member] |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Percentage of ownership, equity method (in hundredths) | 83.00% |  |
Maximum [Member] | Majority-owned Subsidiaries [Member] |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Percentage of ownership, equity method (in hundredths) | 50.00% |  |

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