Quarterly report pursuant to Section 13 or 15(d)

Note 17 - Stock-based Compensation Plans (Details Textual)

v3.21.1
Note 17 - Stock-based Compensation Plans (Details Textual) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Share-based Payment Arrangement, Expense, Tax Benefit $ 1,000 $ 1,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value (in dollars per share) $ 11.48  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value $ 3,000 1,000
Proceeds from Stock Options Exercised 3,000 0
Share-based Payment Arrangement, Exercise of Option, Tax Benefit 1,000 $ 0
Share-based Payment Arrangement, Option [Member]    
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total $ 9,000  
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year) 2 years 1 month 6 days  
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate 0.70% 1.50%
Performance Shares [Member]    
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Weighted Average Volatility Rate 44.80% 34.00%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate 0.20% 1.40%
Share Based Compensation Arrangement by Share Based Payment Award, Performance Period (Year) 3 years 3 years
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period (in shares) 76,055  
Share Based Compensation Arrangement by Share Based Payment Award, Equity Instruments Other Than Options, Target Shares Awards for Grant Number (in shares) 110,542  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value (in dollars per share) $ 41.93  
Restricted Stock Units (RSUs) [Member]    
Share Based Compensation Arrangement by Share Based Payment Award, Equity Instruments Other Than Options, Vested Not Issued (in shares) 457,294  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period (in shares) 30,438  
Nonvested Shares [Member]    
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total $ 47,000  
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year) 2 years 3 months 18 days  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value $ 18,000 $ 23,000
The 2016 Stock Incentive Plan [Member]    
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant (in shares) 6,000,000  
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year) 3 years  
The 2016 Stock Incentive Plan [Member] | Share-based Payment Arrangement, Option [Member] | Maximum [Member]    
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period (Year) 10 years