Annual report pursuant to Section 13 and 15(d)

Note 6 - Stock-based Compensation (Details Textual)

v3.19.1
Note 6 - Stock-based Compensation (Details Textual) - USD ($)
1 Months Ended 12 Months Ended
Aug. 31, 2018
Mar. 31, 2018
Oct. 31, 2017
Dec. 31, 2018
Dec. 31, 2017
Allocated Share-based Compensation Expense, Total       $ 307,000 $ 394,000
Employee Service Share-based Compensation, Tax Benefit from Compensation Expense       $ 0 $ 0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value       $ 0.20 $ 0.19
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period       50,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value         $ 4,400
Stock Issued During Period, Shares, Share-based Compensation, Gross         50,000
Proceeds from Stock Options Exercised         $ 18,100
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested in Period, Fair Value       $ 0 $ 0
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Total       $ 71,000  
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition       1 year 73 days  
Restricted Stock [Member]          
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period       200,000 207,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value       $ 59,000 $ 99,000
Restricted Stock [Member] | Director [Member]          
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period         17,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value         $ 9,000
Stock Issued During Period, Shares, Share-based Compensation, Forfeited 50,000   50,000   140,000
Stock Issued During Period, Value, Share-based Compensation, Forfeited $ 7,000   $ 22,000   $ 65,000
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   100,000      
Restricted Stock [Member] | Director [Member] | Vesting As Scheduled [Member]          
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested in Period, Fair Value       $ 23,000  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period       100,000  
Restricted Stock [Member] | Executive Officer [Member]          
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period         50,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value         $ 25,000