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Stock Options (Fair Value of Options) (Details) (Stock Options [Member], USD $)
3 Months Ended 6 Months Ended
Jun. 30, 2013
Jun. 30, 2013
Stock Options [Member]
   
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Risk free interest rate 1.10% 0.80%
Expected option lives 5 years 5 years
Expected volatility 101.30% 103.20%
Estimated forfeiture rate 10.00% 10.00%
Expected dividend yields 0.00% 0.00%
Weighted average grant date fair value of options $ 0.67 $ 1.39