Annual report pursuant to Section 13 and 15(d)

Note 13 - Stock Based Compensation (Details Textual)

v3.20.1
Note 13 - Stock Based Compensation (Details Textual) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Feb. 17, 2015
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross 7,407 4,433  
APIC, Share-based Payment Arrangement, Option, Increase for Cost Recognition $ 301 $ 204  
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total $ 409    
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition 1 year 182 days    
2015 Stock Option and Incentive Plan [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized     250,000
Share-based Payment Arrangement, Expense $ 0 $ 0  
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] | 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