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Stock-Based Compensation (Details) - $ / shares
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Summary of options outstanding by exercise price range    
Options Exercisable, Weighted Average Exercise Price $ 1.24 $ 3.14
Stock Options [Member]    
Summary of options outstanding by exercise price range    
Options Outstanding, Number Outstanding at 12/31/15 2,184,117  
Options Outstanding, Weighted Average Remaining Contractual Life (years) 3 years 7 months 24 days  
Options Outstanding, Weighted Average Exercise Price $ 4.48  
Options Exercisable, Number Exercisable at 12/31/15 1,888,436  
Options Exercisable, Weighted Average Exercise Price $ 4.63  
Stock Options [Member] | Range one [Member]    
Summary of options outstanding by exercise price range    
Range of Exercise Price, Lower Range Limit 2.08  
Range of Exercise Price, Upper Range Limit $ 3.50  
Options Outstanding, Number Outstanding at 12/31/15 296,450  
Options Outstanding, Weighted Average Remaining Contractual Life (years) 6 years 1 month 6 days  
Options Outstanding, Weighted Average Exercise Price $ 2.98  
Options Exercisable, Number Exercisable at 12/31/15 62,717  
Options Exercisable, Weighted Average Exercise Price $ 2.95  
Stock Options [Member] | Range two [Member]    
Summary of options outstanding by exercise price range    
Range of Exercise Price, Lower Range Limit 3.51  
Range of Exercise Price, Upper Range Limit $ 5.00  
Options Outstanding, Number Outstanding at 12/31/15 1,516,000  
Options Outstanding, Weighted Average Remaining Contractual Life (years) 3 years 1 month 28 days  
Options Outstanding, Weighted Average Exercise Price $ 4.22  
Options Exercisable, Number Exercisable at 12/31/15 1,501,000  
Options Exercisable, Weighted Average Exercise Price $ 4.23  
Stock Options [Member] | Range three [Member]    
Summary of options outstanding by exercise price range    
Range of Exercise Price, Lower Range Limit 5.01  
Range of Exercise Price, Upper Range Limit $ 6.50  
Options Outstanding, Number Outstanding at 12/31/15 201,667  
Options Outstanding, Weighted Average Remaining Contractual Life (years) 4 years 6 months 11 days  
Options Outstanding, Weighted Average Exercise Price $ 5.84  
Options Exercisable, Number Exercisable at 12/31/15 161,385  
Options Exercisable, Weighted Average Exercise Price $ 5.81  
Stock Options [Member] | Range four [Member]    
Summary of options outstanding by exercise price range    
Range of Exercise Price, Lower Range Limit 6.51  
Range of Exercise Price, Upper Range Limit $ 8.21  
Options Outstanding, Number Outstanding at 12/31/15 170,000  
Options Outstanding, Weighted Average Remaining Contractual Life (years) 2 years 9 months 18 days  
Options Outstanding, Weighted Average Exercise Price $ 7.83  
Options Exercisable, Number Exercisable at 12/31/15 163,334  
Options Exercisable, Weighted Average Exercise Price $ 7.84