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Note 7 - NIH Grant Funding (Details) (USD $)
 3 Months Ended 9 Months Ended 12 Months Ended 138 Months Ended 147 Months Ended 59 Months Ended 71 Months Ended 1 Months Ended 12 Months Ended 1 Months Ended
Sep. 30, 2013
Dec. 31, 2012
Sep. 30, 2012
Jun. 30, 2012
Mar. 31, 2012
Dec. 31, 2011
Sep. 30, 2011
Jun. 30, 2011
Mar. 31, 2011
Sep. 30, 2013
Sep. 30, 2012
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2012
Sep. 30, 2013
Aug. 31, 2012
First NIH Grant [Member]
Aug. 31, 2013
First NIH Grant [Member]
Sep. 30, 2013
First NIH Grant [Member]
Dec. 31, 2012
First NIH Grant [Member]
Sep. 30, 2012
Second NIH Grant [Member]
Aug. 31, 2013
Second NIH Grant [Member]
Dec. 31, 2012
Second NIH Grant [Member]
Jul. 31, 2013
Third NIH Grant [Member]
Sep. 30, 2013
Third NIH Grant [Member]
Note 7 - NIH Grant Funding (Details) [Line Items]                                                  
Grant Award                                 $ 20,400,000 $ 20,400,000       $ 1,900,000   $ 277,000  
Unused Grant Funds                                     773,000 1,600,000     1,400,000   249,000
Revenue from Grants $ 1,004,211 $ 459,566 $ 638,000 $ 705,698 $ 854,063 $ 956,844 $ 1,297,006 $ 1,753,033 $ 893,002 $ 2,242,812 $ 2,197,761 $ 2,657,327 $ 4,899,885 $ 5,185,257 $ 22,969,019 $ 25,211,831         $ 1,900,000        
Project Period Covered by Grants                                 5 years         1 year   2 years