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The Company and Summary of Significant Accounting Policies (Details) (USD $) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2013 | 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 | $ 1,377,000 | $ 1,281,000 | $ 741,000 |
Foreign Currency Translation [Abstract] |  |  |  |
Foreign currency transaction exchange gains (losses) | (1,300,000) | (445,000) | (100,000) |
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 | 14,943,000 | 17,912,000 |  |
Increase in allowance for doubtful accounts | 869,000 |  |  |
Warranty Reserve [Abstract] |  |  |  |
Accrued product warranties | 1,048,000 | 588,000 | 1,003,000 |
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 | 12,000 | 19,000 | 16,000 |
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 |  |
Valuation allowance balance | 869,000 | 0 |  |
Allowance for Sales Returns [Member] |  |  |  |
Accounts Receivable and Allowance for Doubtful Accounts and Sales Returns [Line Items] |  |  |  |
Allowance deductions | 189,000 | 426,000 | 144,000 |
Additional allowance for sales return | 130,000 | 547,000 | (194,000) |
Valuation allowance balance | $ 186,000 | $ 245,000 | $ 124,000 | $ 462,000
Major Customer One [Member] |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Number of customers representing significant revenue | 0 | 1 | 1 |
Number of customers who accounted for 10% or more share in trade accounts receivable | 1 | 1 |  |
Percentage of trade accounts receivable accounted by major customer (in hundredths) | 20.00% | 28.00% |  |
Major Customer One [Member] | Revenue [Member] |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Percentage of revenue generated by major customers (in hundredths) |  | 17.00% | 18.00% |
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 |
Top Five Major Customers [Member] | Revenue [Member] |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Percentage of revenue generated by major customers (in hundredths) | 31.00% | 37.00% | 35.00% |
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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