Annual report pursuant to Section 13 and 15(d)

Note 11 - Share-based Awards and Cash-based Awards (Details Textual)

v3.19.3.a.u2
Note 11 - Share-based Awards and Cash-based Awards (Details Textual) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant 10,874,043    
Restricted Stock Units (RSUs) [Member]      
Share-based Compensation Arrangement By Share-based Payment Award, Equity Instruments Other than Options, Granted in Period, Grant Date Fair Value $ 4.5 $ 6.8 $ 5.9
Share-based Compensation Arrangement By Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Grant Date Fair Value 7.0 $ 11.0 $ 5.5
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total $ 5.1    
Restricted Stock Units (RSUs) [Member] | Minimum [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Percent of Adjustments 0.00% 0.00% 0.00%
Restricted Stock Units (RSUs) [Member] | Maximum [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Percent of Adjustments 100.00% 100.00% 100.00%
Restricted Stock [Member]      
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total $ 0.4    
Restricted Stock [Member] | Directors Compensation Plan [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant 82,620    
Share-based Compensation Arrangement By Share-based Payment Award, Equity Instruments Other than Options, Granted in Period, Grant Date Fair Value $ 0.3 $ 0.3 $ 0.3
Share-based Compensation Arrangement By Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Grant Date Fair Value $ 0.5 $ 0.7 $ 0.1
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period 3 years    
Restricted Stock [Member] | Directors Compensation Plan [Member] | Share-based Payment Arrangement, Tranche One [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage 33.00%    
Cash-based Awards [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Adjusted EBITDA Less Interest, Minimum $ 200.0