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Income Taxes (Details) (USD $)
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Income Taxes [Abstract]      
Non-U.S. income included in income (loss) before tax $ 16,300,000 $ 22,000,000 $ 14,500,000
Current [Abstract]      
Federal 0 0 0
State (113,000) 259,000 130,000
Foreign 966,000 2,536,000 2,193,000
Total current 853,000 2,795,000 2,323,000
Deferred [Abstract]      
Federal 0 0 0
State 0 0 0
Total deferred 0 0 0
Total net provision for income taxes 853,000 2,795,000 2,323,000
Reconciliation of effective income tax rates and U.S. statutory federal income tax rate [Abstract]      
Statutory federal income tax rate (in hundredths) 35.00% 35.00% 35.00%
State income taxes, net of federal tax benefits (in hundredths) (1.00%) 0.60% 0.40%
Change in valuation allowance (in hundredths) 23.30% (11.50%) (13.30%)
Stock compensation (in hundredths) 1.50% 0.30% (0.40%)
Foreign rate differences (in hundredths) (72.50%) (17.10%) (12.30%)
Dividend from PRC investee (in hundredths) 30.10% 3.20% 0.00%
Net loss from privately-held PRC investments (in hundredths) (2.60%) (0.70%) (0.40%)
Other (in hundredths) (1.60%) 0.00% 1.20%
Effective tax rate (in hundredths) 12.20% 9.80% 10.20%
Deferred tax assets [Abstract]      
Net operating loss 44,155,000 43,583,000  
Accruals and reserves not yet deductible 5,389,000 4,494,000  
Credits 1,488,000 1,488,000  
Deferred tax assets, gross 51,032,000 49,565,000  
Deferred tax liabilities [Abstract]      
Unrepatriated foreign earnings 0 0  
Total deferred tax liabilities 0 0  
Net deferred tax assets 51,032,000 49,565,000  
Valuation allowance (51,032,000) (49,565,000)  
Net deferred tax assets 0 0  
Operating Loss Carryforwards [Line Items]      
Operating loss carryforwards, expiration period expire beginning in 2022 and 2017    
(Increase) and decrease in valuation allowance (1,500,000) 3,500,000  
Change in cumulative ownership percentage (in hundredths) 50.00%    
Period with in which cumulative ownership change 3 years    
Unrecognized tax benefits interest and penalties 0    
Unrecognized tax benefits accrued interest and penalties 0    
Unrecognized tax liabilities of undistributed earnings of foreign subsidiaries 43,500,000    
Reconciliation of beginning and ending amount of the gross unrecognized tax benefits [Roll Forward]      
Gross unrecognized tax benefits balance at December 31, 2011 16,403,000    
Additions based on tax positions related to the current year 0    
Additions for tax positions of prior years 0    
Gross unrecognized tax benefits balance at December 31, 2012 16,403,000 16,403,000  
Unrecognized tax benefit would favorably impact the effective tax rate in future periods if recognized 16,400,000    
Federal [Member]
      
Operating Loss Carryforwards [Line Items]      
Operating loss carryforwards 131,800,000    
Tax credit carryforwards 1,500,000    
Tax credit carryforward, expiration period Dec. 31, 2019    
State [Member]
      
Operating Loss Carryforwards [Line Items]      
Operating loss carryforwards $ 42,200,000