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Note 1 - Summary of Significant Accounting Policies (Details) (USD $)
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items]      
Available-for-sale Securities (in Dollars) $ 173,574,000 $ 113,235,000  
Deferred Revenue (in Dollars) 1,700,000 1,600,000  
Deferred Costs, Current (in Dollars) 200,000 200,000  
Building and Building Improvements [Member] | Maximum [Member]
      
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items]      
Property, Plant and Equipment, Useful Life 40 years    
Computer Equipment [Member] | Minimum [Member]
      
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items]      
Property, Plant and Equipment, Useful Life 3 years    
Computer Equipment [Member] | Maximum [Member]
      
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items]      
Property, Plant and Equipment, Useful Life 7 years    
Furniture and Fixtures [Member] | Minimum [Member]
      
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items]      
Property, Plant and Equipment, Useful Life 3 years    
Furniture and Fixtures [Member] | Maximum [Member]
      
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items]      
Property, Plant and Equipment, Useful Life 5 years    
Auction Rate Securities [Member]
      
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items]      
Available-for-sale Securities (in Dollars) 9,900,000    
Interest and Other Income, Net [Member]
      
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items]      
Foreign Currency Transaction Gain (Loss), before Tax (in Dollars) $ 600,000 $ 100,000 $ 300,000
Third Party Arrangements [Member] | Distributor Sales [Member]
      
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items]      
Concentration Risk, Percentage 91.00% 91.00%  
Small Distributor Purchase Orders [Member] | Distributor Sales [Member]
      
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items]      
Concentration Risk, Percentage 9.00% 9.00%  
Land Use Rights [Member]
      
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items]      
Finite-Lived Intangible Asset, Useful Life 50 years    
Patents [Member]
      
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items]      
Finite-Lived Intangible Asset, Useful Life 5 years    
Minimum [Member]
      
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items]      
Property, Plant and Equipment, Useful Life 3 years    
Term of Warranty 1 year    
Vendor Payment Terms 30 days    
Maximum [Member]
      
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items]      
Property, Plant and Equipment, Useful Life 40 years    
Term of Warranty 2 years    
Vendor Payment Terms 45 years