Annual report pursuant to Section 13 and 15(d)

Note 10 - Subsequent Events (Details Textual)

v3.19.1
Note 10 - Subsequent Events (Details Textual)
1 Months Ended 12 Months Ended
Mar. 12, 2019
USD ($)
Feb. 26, 2019
USD ($)
Feb. 05, 2019
$ / shares
shares
Oct. 01, 2017
$ / shares
shares
Jan. 31, 2019
USD ($)
Dec. 31, 2018
$ / shares
shares
Dec. 31, 2017
$ / shares
shares
Mar. 20, 2019
USD ($)
Feb. 28, 2019
USD ($)
$ / shares
shares
Feb. 19, 2019
shares
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross | shares       15,000   2,220,000 15,000      
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price | $ / shares       $ 0.13   $ 1.75 $ 0.13      
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period       10 years            
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares           $ 1.75      
Preferred Stock, Shares Authorized | shares           2,534,766        
Common Stock, Shares Authorized | shares           100,000,000 100,000,000      
Employee Stock Option [Member]                    
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period           10 years        
Subsequent Event [Member]                    
Extinguishment of Deferred Compensation, Amount         $ 484,000          
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross | shares     401,750              
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price | $ / shares     $ 1.75              
Share-based Compensation Arrangement by Share-based Payment Award, Options, Number of Quarterly Installments     4              
Preferred Stock, Shares Authorized | shares                   0
Common Stock, Shares Authorized | shares                   100,000,000
Letters of Credit Outstanding, Amount               $ 200,000    
Subsequent Event [Member] | Non-employee Director [Member]                    
One-time Cash Compensation Paid for Services to Each Independent Director   $ 25,000                
Subsequent Event [Member] | Chief Executive Officer [Member]                    
Salary and Wage, Excluding Cost of Good and Service Sold, Total $ 60,000                  
Subsequent Event [Member] | Chief Financial Officer [Member]                    
Salary and Wage, Excluding Cost of Good and Service Sold, Total 70,000                  
Subsequent Event [Member] | Chief Operating Officer [Member]                    
Salary and Wage, Excluding Cost of Good and Service Sold, Total 30,000                  
Subsequent Event [Member] | Board of Directors Chairman [Member]                    
Salary and Wage, Excluding Cost of Good and Service Sold, Total $ 60,000                  
Subsequent Event [Member] | Warrants in Connection with Non-convertible Promissory Notes [Member]                    
Warrants and Rights Outstanding, Term                 5 years  
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares                 $ 1.75  
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right | shares                 1  
Subsequent Event [Member] | Non-convertible Promissory Notes [Member]                    
Debt Instrument, Face Amount                 $ 300,000  
Debt Instrument, Interest Rate, Stated Percentage                 10.00%  
Subsequent Event [Member] | Employee Stock Option [Member]                    
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period     10 years