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Note 5 - Stockholders' Equity (Detail) - Stock Purchase Warrant Transactions (USD $)
 6 Months Ended
Jun. 30, 2012
Outstanding at December 31, 2011 (in Shares) 1,870,559
Outstanding at December 31, 2011 $ 7.96
Exercised (in Shares) 0
Exercised $ 0
Forfeited or expired (in Shares) 0
Forfeited or expired $ 0
Outstanding at June 30, 2012 (in Shares) 11,282,559
Outstanding at June 30, 2012 $ 2.09
Exercisable at June 30, 2012 (in Shares) 8,345,526
Exercisable at June 30, 2012 $ 2.47
Series A Warrants [Member]
  
Number of Shares (in Dollars) $ 2,933,333 [1]
Weighted Average Exercise Price $ 1.00 [1]
Series B Warrants [Member]
  
Number of Shares (in Dollars) 2,933,333 [1]
Weighted Average Exercise Price $ 0.75 [1]
Series C Warrants [Member]
  
Number of Shares (in Dollars) 2,933,333 [1]
Weighted Average Exercise Price $ 1.00 [1]
Other Warrants [Member]
  
Number of Shares (in Dollars) $ 612,001 [2]
Weighted Average Exercise Price $ 1.00 [2]
[1] See discussion under "Series A Convertible Preferred Stock" above.
[2] See discussion under "Common Stock" above.