Annual report pursuant to Section 13 and 15(d)

Stock-Based Compensation - Key Assumptions Estimate Fair Value Of Stock Options (Details)

v3.19.3.a.u2
Stock-Based Compensation - Key Assumptions Estimate Fair Value Of Stock Options (Details)
12 Months Ended
Sep. 30, 2019
Key assumptions used to estimate the fair value of the stock options granted  
Expected common stock price volatility, minimum 75.60%
Expected common stock price volatility, maximum 78.40%
Risk-free interest rate, minimum 1.80%
Risk-free interest rate, maximum 2.50%
Expected dividend yield 0.00%
Minimum  
Key assumptions used to estimate the fair value of the stock options granted  
Expected term of options (years) 1 year 7 months 6 days
Maximum  
Key assumptions used to estimate the fair value of the stock options granted  
Expected term of options (years) 7 years