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Stock Option Plans (Details) (USD $)
6 Months Ended 12 Months Ended
Jun. 30, 2013
Dec. 31, 2012
Summary of option activity for employees and non-employees    
Number of Options, Beginning Balance 1,283,741  
Number of Options, Granted     
Exercise of stock options, shares 40,000  
Number of Options, Forfeited or expired 36,666  
Number of Options, Ending Balance 1,207,075 1,283,741
Number of Options, Exercisable 794,620  
Weighted Averaged Exercise Price, Beginning Balance $ 0.79  
Weighted Averaged Exercise Price, Granted     
Weighted Averaged Exercise Price, Exercised $ 0.74  
Weighted Averaged Exercise Price, Forfeited or expired $ 0.094  
Weighted Averaged Exercise Price, Ending Balance $ 0.87 $ 0.79
Weighted Averaged Exercise Price, Exercisable $ 0.84  
Weighted Average Remaining Contractual Life (Years), Beginning Balance 2 years 8 months 27 days 3 years 26 days
Weighted Average Remaining Contractual Life (Years), Exercised     
Weighted Average Remaining Contractual Life (Years), Forfeited or expired     
Weighted Average Remaining Contractual Life (Years), Exercisable 2 years 2 months 5 days  
Aggregate Intrinsic Options Value, Beginning Balance $ 768,692  
Aggregate Intrinsic Options Value, Ending Balance 614,768 768,692
Aggregate Intrinsic Options Value, Exercisable 421,506  
Option Activity For Non Employees
   
Summary of option activity for employees and non-employees    
Number of Options, Beginning Balance 239,999  
Number of Options, Granted     
Exercise of stock options, shares     
Number of Options, Forfeited or expired     
Number of Options, Ending Balance 239,999 239,999
Number of Options, Exercisable 237,220  
Weighted Averaged Exercise Price, Beginning Balance $ 1.56  
Weighted Averaged Exercise Price, Granted     
Weighted Averaged Exercise Price, Exercised     
Weighted Averaged Exercise Price, Forfeited or expired     
Weighted Averaged Exercise Price, Ending Balance $ 1.04 $ 1.56
Weighted Averaged Exercise Price, Exercisable $ 1.04  
Weighted Average Remaining Contractual Life (Years), Beginning Balance 9 months 29 days 1 year 3 months 26 days
Weighted Average Remaining Contractual Life (Years), Exercised     
Weighted Average Remaining Contractual Life (Years), Forfeited or expired     
Weighted Average Remaining Contractual Life (Years), Exercisable 9 months 22 days  
Aggregate Intrinsic Options Value, Beginning Balance 168,166  
Aggregate Intrinsic Options Value, Ending Balance 151,750 168,166
Aggregate Intrinsic Options Value, Exercisable $ 150,805  
Weighted Average Remaining Contractual Life (Years), Granted