• Filing Date: 2019-07-11
  • Form Type: 10-K
  • Description: Annual report
v3.19.2
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions (Details)
12 Months Ended
Apr. 30, 2019
Apr. 30, 2018
Risk-free interest rate 2.70% 2.14%
Expected volatility 77.20% 95.55%
Expected term 3 years 8 months 12 days 3 years 8 months 12 days
Dividend yield 0.00% 0.00%