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Note 8 - Related Party Transactions (Details) (USD $)
 1 Months Ended 9 Months Ended 12 Months Ended 138 Months Ended 147 Months Ended 1 Months Ended 9 Months Ended 12 Months Ended 9 Months Ended 12 Months Ended
May 31, 2013
Jan. 31, 2013
Feb. 28, 2010
Sep. 30, 2013
Sep. 30, 2012
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2006
Dec. 31, 2005
Dec. 31, 2004
Dec. 31, 2012
Sep. 30, 2013
Jan. 31, 2012
Members of Board of Directors and Management [Member]
Sep. 30, 2013
Ongoing Patent Cost Reimbursements [Member]
Dec. 31, 2012
Ongoing Patent Cost Reimbursements [Member]
Dec. 31, 2011
Ongoing Patent Cost Reimbursements [Member]
Dec. 31, 2010
Ongoing Patent Cost Reimbursements [Member]
Sep. 30, 2013
Research Agreements [Member]
Sep. 30, 2012
Research Agreements [Member]
Dec. 31, 2011
Research Agreements [Member]
Dec. 31, 2010
Research Agreements [Member]
Dec. 31, 2012
Consulting Agreement [Member]
Dec. 31, 2011
Consulting Agreement [Member]
Dec. 31, 2010
Consulting Agreement [Member]
Note 8 - Related Party Transactions (Details) [Line Items]                                                
Related Party Transaction, Expenses from Transactions with Related Party                           $ 24,115 $ 89,885 $ 249,907 $ 193,674 $ 252,478 $ 552,403 $ 1,172,758 $ 1,391,203 $ 24,000 $ 24,000 $ 57,600
Stock Issued During Period, Shares, New Issues (in Shares) 1,166,666 1,766,667 12,000                   380,954                      
Proceeds from Issuance of Common Stock       $ 1,643,333 $ 310,160 $ 310,160 $ 404,410 $ 500,000 $ 1,500,000 $ 750,000 $ 15,836,468 $ 17,479,801 $ 255,239                      
Class of Warrant or Right, Purchase Period                         5 years                      
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in Shares)                         571,432                      
Class of Warrant or Right, Exercise Price of Warrants or Rights (in Dollars per Item)                         1.00