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Note 10 - Stock Based Compensation (Details) - Stock Option and Restricted Stock Awards (USD $)
9 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Stock Option and Restricted Stock Awards [Abstract]    
Equity awards outstanding at December 31, 2012 725,529  
Equity awards outstanding at December 31, 2012 (in Dollars per share) $ 14.63  
Equity awards outstanding at December 31, 2012 4,296  
Equity awards outstanding at December 31, 2012 (in Dollars per share) $ 14.40  
Equity awards granted 187,777  
Equity awards granted (in Dollars per share) $ 4.41  
Equity awards granted 111  
Equity awards granted (in Dollars per share) $ 5.36 $ 9.45
Equity awards exercised (444)  
Equity awards exercised (in Dollars per share) $ 8.42  
Equity awards exercised (12,429)  
Equity awards exercised (in Dollars per share) $ 15.71  
Equity awards forfeited, cancelled or expired (35,268)  
Equity awards forfeited, cancelled or expired (in Dollars per share) $ 17.10  
Equity awards forfeited, cancelled or expired (926)  
Equity awards forfeited, cancelled or expired (in Dollars per share) $ 18.59  
Equity awards outstanding at September 30, 2013 865,609  
Equity awards outstanding at September 30, 2013 (in Dollars per share) $ 12.29  
Equity awards outstanding at September 30, 2013 3,037  
Equity awards outstanding at September 30, 2013 (in Dollars per share) $ 13.64  
Equity awards outstanding at September 30, 2013 6 years 219 days  
Aggregate intrinsic value of outstanding awards September 30, 2013 (in Dollars) $ 136,533  
Aggregate intrinsic value of outstanding awards September 30, 2013 (in Dollars) 15,717  
Equity awards exercisable at September 30, 2013 599,000  
Equity awards exercisable at September 30, 2013 (in Dollars per share) $ 14.31  
Equity awards exercisable at September 30, 2013 5 years 255 days  
Aggregate intrinsic value of awards exercisable at September 30, 2013 (in Dollars) $ 45,009