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Note 5 - Government Grants (Details Textual) - USD ($)
1 Months Ended 3 Months Ended 6 Months Ended 12 Months Ended
Jul. 31, 2014
Jul. 31, 2013
Sep. 30, 2012
Sep. 30, 2007
Jun. 30, 2015
Dec. 31, 2014
Sep. 30, 2014
Jun. 30, 2014
Mar. 31, 2014
Dec. 31, 2013
Sep. 30, 2013
Jun. 30, 2013
Mar. 31, 2013
Jun. 30, 2015
Jun. 30, 2014
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
SBIR Grant [Member]                                    
Revenue from Grants                               $ 258,267 $ 154,563 $ 0
Grant Award $ 289,641 $ 276,690                                
Unused Grant Funds           $ 153,501                   153,501    
NIH Grants [Member]                                    
Revenue from Grants                               882,956 2,417,550 2,657,327
First N I H Grant [Member]                                    
Revenue from Grants                               624,689 833,390 2,227,924
Grant Award       $ 20,400,000                            
Unused Grant Funds           75,464                   75,464    
Second N I H Grant [Member]                                    
Revenue from Grants                               0 1,429,597 429,403
Grant Award     $ 1,900,000                              
Revenue from Grants         $ 71,474 $ 223,089 $ 322,086 $ 180,441 $ 157,340 $ 174,738 $ 1,004,211 $ 441,561 $ 797,040 $ 174,898 $ 337,781 $ 882,956 $ 2,417,550 $ 2,657,327
Unused Grant Funds         $ 353,652                 $ 353,652