Annual report pursuant to Section 13 and 15(d)

Note 6 - Stock-based Compensation (Details Textual)

v3.20.1
Note 6 - Stock-based Compensation (Details Textual) - USD ($)
1 Months Ended 12 Months Ended
Aug. 01, 2018
Mar. 01, 2018
Aug. 31, 2018
Mar. 31, 2018
Dec. 31, 2019
Dec. 31, 2018
Share-based Payment Arrangement, Expense         $ 232,000 $ 307,000
Share-based Payment Arrangement, Expense, Tax Benefit         $ 0 $ 0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value         $ 1.65 $ 4
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period         0 0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested in Period, Fair Value         $ 0 $ 0
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total         $ 46,000  
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition         1 year  
Restricted Stock [Member]            
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period         5,000 10,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value         $ 14,000 $ 59,000
Restricted Stock [Member] | Director [Member]            
Shares Issued, Shares, Share-based Payment Arrangement, Forfeited 2,500          
Shares Issued, Value, Share-based Payment Arrangement, Forfeited     $ 7,000      
Restricted Stock [Member] | Director [Member] | Vesting Upon Retirement [Member]            
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested in Period, Fair Value       $ 36,000    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period   5,000        
Restricted Stock [Member] | Director [Member] | Vesting As Scheduled [Member]            
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested in Period, Fair Value         $ 14,000 $ 23,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period         5,000 5,000