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1. Summary of Significant Accounting Policies (Details-Options outstanding) - $ / shares
6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Number of Shares    
Outstanding options, beginning balance 11,228,000  
Granted 2,015,000  
Exercised (29,200) (978,000)
Forfeited 0  
Outstanding options, ending balance 13,214,000  
Options exercisable 7,288,000  
Weighted Average Exercise Price    
Outstanding options, beginning balance $ 4.66  
Granted 3.48  
Exercised 1.18  
Forfeited  
Outstanding options, ending balance 4.49  
Options exercisable $ 3.82  
Weighted Average Remaining Contractual Term    
Weighted Average Remaining Contractual Term, beginning 5 years 6 months 18 days  
Weighted Average Remaining Contractual Term, ending 5 years 3 months 29 days  
Options exercisable 4 years 7 months 28 days