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Note 14 - Share-Based Payments (Detail) - Details of stock option transactions for the three months ended June 30, 2011 and June 30, 2010 are (USD $)
3 Months Ended 9 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2012
Sep. 30, 2011
Outstanding, beginning of period 8,524,499 8,237,124 8,746,041 8,272,249
Outstanding, beginning of period (in Dollars per share) $ 0.62 $ 0.55 $ 0.57 $ 0.56
Granted 220,000 706,000 769,000 706,000
Granted (in Dollars per share) $ 1.38 $ 0.74 $ 1.36 $ 0.74
Exercised (20,187) (22,583) (693,340) (29,833)
Exercised (in Dollars per share) $ 0.70 $ 0.47 $ 0.52 $ 0.47
Forfeited (56,689) (24,875) (154,064) (52,750)
Forfeited (in Dollars per share) $ 0.83 $ 0.75 $ 0.80 $ 0.72
Expired (3,000)   (3,014)  
Expired (in Dollars per share) $ 0.44   $ 0.44  
Outstanding, end of period 8,664,623 8,895,666 8,664,623 8,895,666
Outstanding, end of period (in Dollars per share) $ 0.64 $ 0.54 $ 0.64 $ 0.54
Options exercisable, end of period 7,160,766 7,155,916 7,160,766 7,155,916
Options exercisable, end of period (in Dollars per share) $ 0.57 $ 0.54 $ 0.57 $ 0.54