Annual report pursuant to Section 13 and 15(d)

Stock-Based Compensation (Schedule of Stock Options) (Details)

v2.4.0.6
Stock-Based Compensation (Schedule of Stock Options) (Details) (USD $)
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Number of Options      
Outstanding at beginning of year 3,315,000    
Granted 1,351,027    
Exercised (1,232,001) (2,697,833) (491,667)
Forfeited (12,249)    
Expired (9,000)    
Outstanding at end of year 3,412,777 3,315,000  
Exercisable at end of year 1,836,237    
Weighted Average Exercise Price      
Outstanding at beginning of year $ 1.02    
Granted $ 3.16    
Exercised $ 0.62    
Forfeited $ 2.18    
Expired $ 1.73    
Outstanding at end of year $ 2.01 $ 1.02  
Exercisable at end of year $ 1.1    
Weighted Average Remaining Contractual Life (years)      
Outstanding at end of year 6 years 9 months 18 days    
Exercisable at end of year 4 years 10 months 24 days    
Aggregate Intrinsic Value      
Outstanding at end of year $ 3,530,862    
Exercisable at end of year $ 3,271,747