XML 155 R135.htm IDEA: XBRL DOCUMENT v3.7.0.1
Note 20 - Share-based Payment Award, Stock Options, Valuation Assumptions (Details) - $ / shares
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Weighted-average fair value of options granted (in Dollars per share) $ 5.56 $ 5.94 $ 7.74
Weighted-average risk-free interest rate 1.32% 1.46% 1.46%
Range of risk-free interest rates 0.93% 1.26% 1.39%
Range of risk-free interest rates 1.96% 1.60% 1.51%
Weighted-average expected option lives (years) 4 years 7 months 6 days 4 years 6 months 4 years 6 months
Expected option lives (years)   4 years 6 months 4 years 6 months
Weighted-average volatility 47.00% 46.00% 39.00%
Range of expected volatilities 44.00% 40.00% 36.00%
Range of expected volatilities 51.00% 49.00% 42.00%
Weighted-average expected dividend yield 0.00% 0.00% 0.00%
Minimum [Member]      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Expected option lives (years) 4 years 6 months    
Maximum [Member]      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Expected option lives (years) 4 years 10 months 24 days