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Note 10 - Stock Based Compensation (Details) - Stock Option and Restricted Stock Awards (USD $)
6 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Stock Option and Restricted Stock Awards [Abstract]    
Equity awards outstanding at December 31, 2012 3,264,880  
Equity awards outstanding at December 31, 2012 (in Dollars per share) $ 3.25  
Equity awards outstanding at December 31, 2012 19,334  
Equity awards outstanding at December 31, 2012 (in Dollars per share) $ 3.20  
Equity awards granted 845,000  
Equity awards granted (in Dollars per share) $ 0.98  
Equity awards exercised (1,500)  
Equity awards exercised (in Dollars per share) $ 2.09  
Equity awards exercised (55,932) (55,932)
Equity awards exercised (in Dollars per share) $ 3.49  
Equity awards forfeited, cancelled or expired (36,667)  
Equity awards forfeited, cancelled or expired (in Dollars per share) $ 6.45  
Equity awards forfeited, cancelled or expired (4,167)  
Equity awards forfeited, cancelled or expired (in Dollars per share) $ 4.13  
Equity awards outstanding at June 30, 2013 4,017,281  
Equity awards outstanding at June 30, 2013 (in Dollars per share) $ 2.74  
Equity awards outstanding at June 30, 2013 13,667  
Equity awards outstanding at June 30, 2013 (in Dollars per share) $ 3.03  
Equity awards outstanding at June 30, 2013 7 years 36 days  
Aggregate intrinsic value of outstanding awards June 30, 2013 (in Dollars) $ 25,600  
Aggregate intrinsic value of outstanding awards June 30, 2013 (in Dollars) 13,940  
Equity awards exercisable at June 30, 2013 2,662,879  
Equity awards exercisable at June 30, 2013 (in Dollars per share) $ 2.26  
Equity awards exercisable at June 30, 2013 6 years 36 days  
Aggregate intrinsic value of awards exercisable at June 30, 2013 (in Dollars) $ 8,440