Annual report pursuant to Section 13 and 15(d)

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

v3.19.1
Note 4 - Stockholders' Equity - Fair Value Assumptions for Stock Options (Details)
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Annual dividend
Minimum [Member]    
Expected life (Year) 2 years 182 days 109 days
Risk free interest rate 2.50% 0.80%
Expected volatility 97.00% 62.20%
Maximum [Member]    
Expected life (Year) 5 years 109 days 6 years 182 days
Risk free interest rate 2.80% 2.22%
Expected volatility 113.00% 98.00%