XML 30 R21.htm IDEA: XBRL DOCUMENT v3.3.1.900
Note 2 - Summary of Significant Accounting Policies (Tables)
12 Months Ended
Dec. 31, 2015
Notes Tables  
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]
 
 
Year Ended
December 31,
 
 
 
2015
 
 
2014
 
                 
Stock options to purchase common stock
    8,177,291       2,291,783  
Warrants to purchase common stock
    3,066,447       1,793,887  
Rights to common stock
    -       566,038