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Note 2 - Summary of Significant Accounting Policies (Detail) - Option Activity (USD $)
3 Months Ended
Mar. 31, 2013
Outstanding as of December 31, 2012 2,184,583
Outstanding as of December 31, 2012 (in Dollars per share) $ 2.20
Granted 1,052,500
Granted (in Dollars per share) $ 0.23
Cancelled/forfeited (25,200)
Cancelled/forfeited (in Dollars per share) $ 2.65
Outstanding as of March 31, 2013 3,211,883
Outstanding as of March 31, 2013 (in Dollars per share) $ 1.55
Outstanding as of March 31, 2013 7 years 219 days
Exercisable as of March 31, 2013 1,565,450
Exercisable as of March 31, 2013 (in Dollars per share) $ 2.74
Exercisable as of March 31, 2013 5 years 328 days