Quarterly report pursuant to Section 13 or 15(d)

Significant Accounting Policies - Key Assumptions Estimate Fair Value Of Stock Options (Details)

v3.20.1
Significant Accounting Policies - Key Assumptions Estimate Fair Value Of Stock Options (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Mar. 31, 2019
Mar. 31, 2020
Mar. 31, 2019
Key assumptions used to estimate the fair value of the stock options granted      
Expected term of options (years)   7 years  
Expected common stock price volatility   76.00%  
Risk-free interest rate     2.50%
Minimum      
Key assumptions used to estimate the fair value of the stock options granted      
Expected term of options (years)     5 years 6 months
Maximum      
Key assumptions used to estimate the fair value of the stock options granted      
Expected term of options (years)     6 years
Restatement Adjustment      
Key assumptions used to estimate the fair value of the stock options granted      
Net decrease in share-based compensation expense $ 0.1   $ 0.3