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Stock-Based Compensation (Details) (Stock Options [Member], USD $)
 12 Months Ended
Dec. 31, 2013
Summary of options outstanding by exercise price range  
Options Outstanding, Number Outstanding at 12/31/13 1,600,583
Options Outstanding, Weighted Average Remaining Contractual Life (years) 5 years 4 months 24 days
Options Outstanding, Weighted Average Exercise Price $ 5.22
Options Exercisable, Number Exercisable at 12/31/13 1,223,220
Options Exercisable, Weighted Average Exercise Price $ 5.28
Range 1 [Member]
  
Summary of options outstanding by exercise price range  
Range of Exercise Price, Lower Range Limit $ 4.02
Range of Exercise Price, Upper Range Limit $ 4.25
Options Outstanding, Number Outstanding at 12/31/13 1,241,000
Options Outstanding, Weighted Average Remaining Contractual Life (years) 5 years 3 months 18 days
Options Outstanding, Weighted Average Exercise Price $ 4.24
Options Exercisable, Number Exercisable at 12/31/13 1,097,694
Options Exercisable, Weighted Average Exercise Price $ 4.25
Range 2 [Member]
  
Summary of options outstanding by exercise price range  
Range of Exercise Price, Lower Range Limit $ 4.26
Range of Exercise Price, Upper Range Limit $ 7.70
Options Outstanding, Number Outstanding at 12/31/13 348,583
Options Outstanding, Weighted Average Remaining Contractual Life (years) 6 years 1 month 6 days
Options Outstanding, Weighted Average Exercise Price $ 5.43
Options Exercisable, Number Exercisable at 12/31/13 114,526
Options Exercisable, Weighted Average Exercise Price $ 5.25
Range 3 [Member]
  
Summary of options outstanding by exercise price range  
Range of Exercise Price, Lower Range Limit $ 7.71
Range of Exercise Price, Upper Range Limit $ 122.50
Options Outstanding, Number Outstanding at 12/31/13 11,000
Options Outstanding, Weighted Average Remaining Contractual Life (years) 8 months 12 days
Options Outstanding, Weighted Average Exercise Price $ 108.45
Options Exercisable, Number Exercisable at 12/31/13 11,000
Options Exercisable, Weighted Average Exercise Price $ 108.45