Quarterly report pursuant to Section 13 or 15(d)

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

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Stock-Based Compensation - Key Assumptions Estimate Fair Value Of Stock Options (Details)
3 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Key assumptions used to estimate the fair value of the stock options granted    
Expected term of options (years)   6 years
Minimum    
Key assumptions used to estimate the fair value of the stock options granted    
Expected term of options (years) 5 years 1 month 6 days  
Expected common stock price volatility, minimum 73.80% 83.10%
Risk-free interest rate, minimum 1.10% 0.60%
Maximum    
Key assumptions used to estimate the fair value of the stock options granted    
Expected term of options (years) 6 years 1 month 6 days  
Expected common stock price volatility, maximum 74.50% 83.30%
Risk-free interest rate, maximum 1.40% 0.70%