Quarterly report pursuant to Section 13 or 15(d)

Note 10 - Stock Based Compensation (Details Textual)

v3.19.3
Note 10 - Stock Based Compensation (Details Textual) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Dec. 31, 2018
Feb. 27, 2015
Share-based Payment Arrangement, Expense $ 233 $ 104        
Share Based Compensation Expense, Estimated Future Compensation, Total     $ 478      
Share Based Compensation Expense, Estimated For Remainder of Fiscal Year     68      
Share Based Compensation Expense, Estimated For Year Two     242      
Share Based Compensation Expense, Estimated For Year Three     149      
Share Based Compensation Expense, Estimated For Year Four     $ 19      
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross     7,407   4,433  
2015 Stock Option and Incentive Plan [Member]            
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized           250,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross     0 0    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number, Ending Balance 0   0      
2015 Stock Option and Incentive Plan [Member] | Restricted Stock [Member]            
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period     7,407 4,433    
2015 Stock Option and Incentive Plan [Member] | Restricted Stock [Member] | Minimum [Member]            
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period     3 years      
2015 Stock Option and Incentive Plan [Member] | Restricted Stock [Member] | Maximum [Member]            
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period     5 years