v2.4.0.8
Property and Equipment—Net (Details) (USD $)
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Property, Plant and Equipment, Net, by Type [Abstract]      
Total property and equipment $ 78,450,000 $ 56,858,000  
Less: accumulated depreciation (41,798,000) (31,220,000)  
Property and equipment - net 36,652,000 25,638,000  
Depreciation expense 13,900,000 10,500,000 7,000,000
Payments to acquire real estate   14,500,000  
Land [Member]
      
Property, Plant and Equipment, Net, by Type [Abstract]      
Total property and equipment 13,895,000 13,895,000  
Payments to acquire real estate   13,900,000  
Building and building improvements [Member]
      
Property, Plant and Equipment, Net, by Type [Abstract]      
Total property and equipment 610,000 610,000  
Payments to acquire real estate   600,000  
Evaluation units [Member]
      
Property, Plant and Equipment, Net, by Type [Abstract]      
Total property and equipment 23,442,000 18,322,000  
Computer equipment and software [Member]
      
Property, Plant and Equipment, Net, by Type [Abstract]      
Total property and equipment 22,442,000 17,176,000  
Furniture and fixtures [Member]
      
Property, Plant and Equipment, Net, by Type [Abstract]      
Total property and equipment 1,697,000 1,501,000  
Construction-in-progress [Member]
      
Property, Plant and Equipment, Net, by Type [Abstract]      
Total property and equipment 10,947,000 0  
Leasehold improvements and tooling [Member]
      
Property, Plant and Equipment, Net, by Type [Abstract]      
Total property and equipment $ 5,417,000 $ 5,354,000