Annual report pursuant to Section 13 and 15(d)

Stock-Based Compensation - Additional information (Details)

v3.21.4
Stock-Based Compensation - Additional information (Details) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Stock-Based Compensation    
Unrecognized compensation costs $ 4,900  
Weighted-average amortization period 1 year 6 months  
Intrinsic value of stock options exercised $ 200 $ 100
Weighted average grant date fair value of options granted $ 3.84 $ 5.23
Net incremental compensation expense incurred $ 30  
Term of accelerated vesting of unvested options and an extension of vested and unvested options 2 years 6 months  
Stock options granted to consultant for future services 225,000  
Unvested restricted stock    
Stock-Based Compensation    
Weighted-average amortization period 0 years  
Fair value of restricted stock vested $ 100 $ 100
2016 Plan    
Stock-Based Compensation    
Number of common stock authorized 291,667  
Common shares were available for future grants 147,041  
2019 Plan    
Stock-Based Compensation    
Number of common stock authorized 4,709,277  
Common shares were available for future grants 407,852  
Minimum    
Stock-Based Compensation    
Vesting period (in years) 1 year  
Maximum    
Stock-Based Compensation    
Vesting period (in years) 4 years  
Expiration period (in years) 10 years