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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%