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Note 22 - Share-based Payment Award, Stock Options, Valuation Assumptions (Details) - $ / shares
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]    
Weighted-average fair value of options granted (in Dollars per share) $ 2.45 $ 2.26
Weighted-average risk-free interest rate 2.70% 1.77%
Range of risk-free interest rates 2.59% 1.64%
Range of risk-free interest rates 2.95% 2.11%
Weighted-average expected option lives (years) 4 years 6 months 4 years 6 months
Expected option lives (years)   4 years 6 months
Weighted-average volatility 81.00% 46.00%
Range of expected volatilities 80.00% 46.00%
Range of expected volatilities 83.00% 49.00%
Weighted-average expected dividend yield 0.00% 0.00%
Minimum [Member]    
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]    
Expected option lives (years) 4 years 4 months 24 days  
Maximum [Member]    
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]    
Expected option lives (years) 4 years 6 months