2. Summary of Significant Accounting Policies (Tables)
 3 Months Ended
Mar. 31, 2017
Summary Of Significant Accounting Policies Tables  
Anti-dilutive shares
   March 31, 2017  December 31, 2016
Options to purchase common stock   151,881    151,881 
Warrants to purchase common stock   151,563    152,812 
Convertible notes   1,222,561    1,041,748 
Potential equivalent shares excluded   1,526,005    1,346,441