XML 73 R59.htm IDEA: XBRL DOCUMENT v3.20.4
Note 9 - Share-based Compensation (Details Textual) - USD ($)
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2015
Proceeds from Stock Options Exercised $ 1,734,000 $ 0 $ 0  
Share-based Payment Arrangement, Exercise of Option, Tax Benefit 6,300,000 2,000,000.0 3,800,000  
Share-based Payment Arrangement, Option [Member]        
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total $ 1,400,000      
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year) 2 years 11 months 15 days      
Share-based Payment Arrangement, Option [Member] | Direct, Selling, General and Administrative Expenses [Member]        
Share-based Payment Arrangement, Expense $ 680,000 $ 934,000 $ 1,100,000  
Common Stock Options [Member]        
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross (in shares) 70,471 100,615 116,276  
Nonvested [Member]        
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year) 5 years      
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total $ 138,000      
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year) 3 years      
Nonvested [Member] | Direct, Selling, General and Administrative Expenses [Member]        
Share-based Payment Arrangement, Expense $ 23,000 $ 290,000 $ 428,000  
Restricted Stock [Member]        
Tax Benefit Realized Restricted Stock Vested $ 235,000 0 168,000  
The 2001 Equity Incentive Plan [Member]        
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant (in shares)       0
The 2001 Equity Incentive Plan [Member] | Share-based Payment Arrangement, Option [Member] | Minimum [Member]        
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year) 1 year      
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period (Year) 5 years      
The 2001 Equity Incentive Plan [Member] | Share-based Payment Arrangement, Option [Member] | Maximum [Member]        
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year) 5 years      
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period (Year) 10 years      
Director Plan 2004 [Member]        
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant (in shares) 830,419      
Share-based Compensation Arrangement by Share-based Payment Award, Options Grants Cumulative (in shares) 2,169,581      
Director Plan 2004 [Member] | Nonqualified Stock Options [Member] | Director [Member]        
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year) 1 year      
Share Based Compensation Arrangement By Share Based Payment Award, Award Annual Options Grant Amount $ 100,000 $ 100,000 $ 100,000  
Director Plan 2004 [Member] | Nonqualified Stock Options [Member] | Minimum [Member] | Director [Member]        
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period (Year) 3 years      
Director Plan 2004 [Member] | Nonqualified Stock Options [Member] | Maximum [Member] | Director [Member]        
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period (Year) 10 years      
The 2006 Equity Incentive Plan [Member]        
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant (in shares) 779,800      
Share-based Compensation Arrangement by Share-based Payment Award, Options Grants Cumulative (in shares) 1,020,200      
The 2006 Equity Incentive Plan [Member] | Minimum [Member]        
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period (Year) 5 years      
The 2006 Equity Incentive Plan [Member] | Maximum [Member]        
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period (Year) 10 years      
The 2006 Equity Incentive Plan [Member] | Nonvested [Member]        
Stock Issued During Period, Shares, Restricted Stock Award, Gross (in shares) 0 6,005 6,793  
Share-based Compensation Arrangement by Share-based Payment Award, Nonvested Restricted Stock, Outstanding Number (in shares) 6,005      
Common Class B [Member]        
Share-based Payment Arrangement, Accelerated Cost     $ 331,000  
Common Class B [Member] | The 2001 Equity Incentive Plan [Member]        
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in shares) 300,000      
Common Class B [Member] | Director Plan 2004 [Member]        
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in shares) 500,000      
Common Class B [Member] | The 2006 Equity Incentive Plan [Member]        
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in shares) 300,000      
Common Stock [Member] | The 2001 Equity Incentive Plan [Member]        
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in shares) 1,800,000      
Common Stock [Member] | Director Plan 2004 [Member]        
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in shares) 3,000,000      
Common Stock [Member] | The 2006 Equity Incentive Plan [Member]        
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in shares) 1,800,000