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3. Summary of Significant Accounting Policies (Tables)
3 Months Ended
Jun. 30, 2016
Accounting Policies [Abstract]  
Schedule of antidilutive shares
   June 30, 
   2016   2015 
Options to purchase common stock   754,000    596,000 
Warrants to purchase common stock   1,468,000    1,548,000 
    2,222,000    2,144,000