Quarterly report pursuant to Section 13 or 15(d)

Note 5 - Stockholders' Equity - Fair Value Assumptions for Stock Options (Details)

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Note 5 - Stockholders' Equity - Fair Value Assumptions for Stock Options (Details)
3 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Annual dividend
Minimum [Member]    
Expected life (in years) (Year) 109 days 6 years
Risk free interest rate 0.80% 1.35%
Expected volatility 62.20% 69.00%
Maximum [Member]    
Expected life (in years) (Year) 4 years 7 years
Risk free interest rate 1.72% 1.75%
Expected volatility 82.30% 80.20%