XML 55 R35.htm IDEA: XBRL DOCUMENT v3.19.3
Note 6 - Stock-based Compensation (Details Textual) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 9 Months Ended
May 08, 2019
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Authorized 750,000          
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant   439,370   439,370    
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized   2,300,000   2,300,000    
Maximum Number of Shares of Class A Common Stock Awarded to any Participant in the Incentive Plan in any Calendar Year   200,000   200,000    
Share-based Payment Arrangement, Option, Exercise Price Range, Shares Outstanding, Ending Balance   0   0   0
Share-based Payment Arrangement, Shares Withheld for Tax Withholding Obligation       35,735    
Share-based Compensation Arrangement by Share-based Payment Award, Per Share Weighted Average Price of Shares Purchased   $ 21.33   $ 21.33    
Payment, Tax Withholding, Share-based Payment Arrangement       $ 762 $ 81  
Salaries Wages And Related Expenses [Member]            
Share-based Payment Arrangement, Expense   $ 600 $ 1,100 100 2,900  
General Supplies and Expenses [Member]            
Share-based Payment Arrangement, Expense   $ 400 $ 400 $ 400 $ 400