XML 57 R47.htm IDEA: XBRL DOCUMENT v3.21.4
STOCK COMPENSATION (Details 1)
12 Months Ended
Sep. 30, 2021
Sep. 30, 2020
STOCK COMPENSATION    
Expected stock price volatility, min 90.42% 87.36%
Expected stock price volatility, max 97.22% 90.26%
Risk-free interest rate, min 0.85% 0.62%
Risk-free interest rate, max 1.65% 1.87%
Expected life of options, min 9 years 8 months 4 days 9 years 8 months 4 days
Expected life of options, max 9 years 8 months 8 days 9 years 8 months 8 days
Expected dividend yield 0.00% 0.00%