Annual report pursuant to Section 13 and 15(d)

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

v2.4.0.8
Stock-Based Compensation (Schedule of Stock Options) (Details) (USD $)
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Number of Options      
Outstanding at beginning of year 3,412,777    
Granted 1,705,725    
Exercised (60,000) (1,232,001) (2,697,833)
Cancelled and forfeited (111,900)    
Expired (80,000)    
Outstanding at end of year 4,866,602 3,412,777  
Exercisable at end of year 2,265,581    
Weighted Average Exercise Price      
Outstanding at beginning of year $ 2.01    
Granted $ 3.04    
Exercised $ 0.84    
Cancelled and forfeited $ 2.98    
Expired $ 0.31    
Outstanding at end of year $ 2.38 $ 2.01  
Exercisable at end of year $ 1.57    
Weighted Average Remaining Contractual Life (years)      
Outstanding at end of year 7 years 0 months 30 days    
Exercisable at end of year 5 years 1 month 25 days    
Aggregate Intrinsic Value      
Outstanding at end of year $ 1,870,550    
Exercisable at end of year $ 1,858,263