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Note 22 - Stock Option Activity (Details) - USD ($)
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Stock Option Activity [Abstract]    
Shares Under Option, Outstanding 4,807,855  
Shares Under Option, Granted 1,115,791  
Shares Under Option, Forfeited 727,709  
Shares Under Option, Outstanding 5,195,937  
Shares Under Option, Exercisable 2,748,006  
Shares Under Option, Expected to vest 2,447,931  
Weighted Average Exercise Price Per Share, Outstanding $ 14.30  
Weighted Average Exercise Price Per Share, Granted 8.45  
Weighted Average Exercise Price Per Share, Forfeited 8.58  
Weighted Average Exercise Price Per Share, Outstanding 13.85  
Weighted Average Exercise Price Per Share, Exercisable 15.65  
Weighted Average Exercise Price Per Share, Expected to vest $ 11.81  
Weighted Average Remaining Contractual Life, Outstanding 4 years 11 months 23 days  
Weighted Average Remaining Contractual Life, Exercisable 4 years 2 months 23 days  
Weighted Average Remaining Contractual Life, Expected to vest 5 years 9 months 25 days  
Aggregate Intrinsic Value, Outstanding $ 0 $ 0
Aggregate Intrinsic Value, Exercisable 0 0
Aggregate Intrinsic Value, Expected to vest $ 0 $ 0