XML 41 R40.htm IDEA: XBRL DOCUMENT v3.20.1
Note 5 - Share-based Compensation (Details Textual) - USD ($)
3 Months Ended 12 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Dec. 31, 2018
Dec. 31, 2015
Proceeds from Stock Options Exercised $ 0 $ 0    
Share-based Payment Arrangement, Option [Member]        
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total $ 2,200,000      
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year) 3 years 215 days      
Share-based Payment Arrangement, Option [Member] | Direct Fixed and Selling, General and Administrative Expense [Member]        
Share-based Payment Arrangement, Expense $ 282,000 $ 230,000    
Common Stock Options [Member]        
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross (in shares) 48,934 73,331    
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 $ 361,000      
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year) 2 years 332 days      
Nonvested [Member] | Direct Fixed and Selling, General and Administrative Expense [Member]        
Share-based Payment Arrangement, Expense $ 50,000 $ 73,000    
Restricted Stock [Member]        
Tax Benefit Realized Restricted Stock Vested (in shares) 34,622      
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] | 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  
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] | 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      
Share-based Compensation Arrangement by Share-based Payment Award, Nonvested Restricted Stock, Outstanding Number (in shares) 49,554      
Common Stock [Member]        
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross (in shares) 48,934      
Tax Benefit Realized Restricted Stock Vested (in shares) 34,622      
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      
Common Stock [Member] | The 2006 Equity Incentive Plan [Member] | Nonvested [Member]        
Stock Issued During Period, Shares, Restricted Stock Award, Gross (in shares)   6,005