Quarterly report pursuant to Section 13 or 15(d)

Note 4 - Stockholders' Equity - Fair Value Assumptions for Stock Options (Details)

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Note 4 - Stockholders' Equity - Fair Value Assumptions for Stock Options (Details)
9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Annual dividend
Minimum [Member]    
Expected life (Year) 4 years 292 days 2 years 182 days
Risk free interest rate 1.80% 2.70%
Expected volatility 97.00% 97.00%
Maximum [Member]    
Expected life (Year) 5 years 182 days 5 years 109 days
Risk free interest rate 2.50% 2.80%
Expected volatility 115.00% 117.00%