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Note 8 - Common Stock (Details Textual) - USD ($)
 1 Months Ended 5 Months Ended 12 Months Ended
Oct. 31, 2014
Sep. 30, 2014
Oct. 31, 2013
May. 30, 2013
Jan. 17, 2013
Nov. 30, 2014
May. 31, 2013
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
May. 14, 2013
Apr. 30, 2013
Dec. 31, 2012
Common Stock Warrants [Member] | Common Stock [Member]                          
Stock Issued During Period, Shares, New Issues             2,933,333            
Proceeds from Warrant Exercises             $ 1,643,333            
Warrant Exercise Price Adjustment [Member]                          
Class of Warrant or Right, Outstanding                     1,166,666    
Warrants with Modified Exercise Prices [Member] | Scenario, Previously Reported [Member]                          
Class of Warrant or Right, Exercise Price of Warrants or Rights   $ 16.50                      
Warrants with Modified Exercise Prices [Member]                          
Class of Warrant or Right, Outstanding   818,376                      
Class of Warrant or Right, Exercise Price of Warrants or Rights   $ 1                      
Common Stock [Member]                          
Stock Issued During Period, Shares, Issued for Services     50,000           378,205 50,000      
Warrant [Member]                          
Other General and Administrative Expense       $ 19,617 $ 218,551                
General and Administrative Expense [Member]                          
Allocated Share-based Compensation Expense     $ 20,500                    
Third Party Consulting Services [Member]                          
Stock Issued During Period, Shares, Issued for Services           378,205              
Allocated Share-based Compensation Expense           $ 100,000              
Expense Associated with Warrant Modifications [Member]                          
General and Administrative Expense   $ 39,711           $ 0 $ 39,712 $ 238,168      
Proceeds from Warrant Exercises $ 873,400     $ 583,333 $ 1,060,000                
Stock Issued During Period, Shares, Warrants Exercised 3,176,000                        
Class of Warrant or Right, Outstanding         2,933,333     56,442,157          
Class of Warrant or Right, Exercise Price of Warrants or Rights         $ 0.60     $ 0.14     $ 0.50 $ 0.60 $ 0.75
Number Of Warrants Issued During Period         1,766,667                
Class of Warrant or Right, Unissued         1,166,666                
General and Administrative Expense               $ 1,429,731 $ 1,807,605 $ 1,792,160      
Warrant Exercise Fee Per Share $ 0.075