Quarterly report pursuant to Section 13 or 15(d)

Note 4 - Stock-based Compensation (Details Textual)

v3.19.2
Note 4 - Stock-based Compensation (Details Textual) - USD ($)
3 Months Ended 6 Months Ended
Jun. 01, 2016
May 18, 2006
Jun. 30, 2019
Mar. 31, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number, Ending Balance     1,351,500 1,372,000   1,351,500   1,376,500
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross     3,000 30,000 3,000 160,000  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value     $ 0.11   $ 0.11    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period     10,000 0 10,000 0  
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total     $ 1,877     $ 1,877    
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition           180 days    
Share-based Payment Arrangement, Expense     $ 482   $ 9,368 $ 4,936 $ 15,656  
Share-based Payment Arrangement, Nonemployee [Member]                
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross     0   0 0 0  
Share-based Payment Arrangement, Expense     $ 0   $ 218 $ 0 $ 218  
The 2016 Stock Incentive Plan [Member]                
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized 1,000,000              
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period 10 years              
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number, Ending Balance     373,500     373,500    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number     344,500     344,500    
The 2006 Stock Incentive Plan [Member]                
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized   1,950,000            
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period   10 years            
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number, Ending Balance     978,000     978,000    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number     978,000     978,000