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Stock Options (Details 1) (USD $)
 12 Months Ended
Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Number of Options, Outstanding at January 1, 2013 (in shares) 2,986,057
Number of Options, Granted (in shares) 1,014,022
Number of Options, Exercised (in shares) (201,500)
Number of Options, Forfeited/Expired (in shares) (750,510)
Number of Options, Outstanding at December 31, 2013 (in shares) 3,048,069
Number of Options, Exercisable at December 31, 2013 (in shares) 943,557
Number of Options, Vested and expected to vest at December 31, 2013 (in shares) 3,048,069
Weighted - Average Exercise Price, Outstanding at January 1, 2013 (in dollars per share) $ 2.75
Weighted - Average Exercise Price, Granted (in dollars per shares) $ 1.89
Weighted - Average Exercise Price, Exercised (in dollars per share) $ 0.96
Weighted - Average Exercise Price, Forfeited/Expired (in dollars per share) $ 3.09
Weighted - Average Exercise Price, Outstanding at December 31, 2013 (in dollars per share) $ 2.99
Weighted - Average Exercise Price, Exercisable at December 31, 2013 (in dollars per share) $ 2.98
Weighted - Average Exercise Price,Vested and expected to vest at December 31, 2013 (in dollars per share) $ 2.99
Weighted - Average Remaining Contractual Term, Outstanding at December 31, 2013 (in years) 4 years 5 months 23 days
Weighted - Average Remaining Contractual Term, Exercisable at December 31, 2013 (in years) 2 years 1 month 17 days
Weighted - Average Remaining Contractual Term, Vested and expected to vest at December 31, 2013 (in years) 4 years 5 months 23 days
Aggregate Intrinsic Value, Outstanding at December 31, 2013 $ 365,410
Aggregate Intrinsic Value, Exercisable at December 31, 2013 361,610
Aggregate Intrinsic Value, Vested and expected to vest at December 31, 2013 $ 365,410