Annual report pursuant to Section 13 and 15(d)

Share-based Compensation (Narrative) (Details)

v3.24.1
Share-based Compensation (Narrative) (Details) - USD ($)
12 Months Ended
Oct. 18, 2018
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2017
Mar. 29, 2022
Jul. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Tax benefit of stock-based compensation expense   $ 4,000,000.0 $ 2,500,000      
Stock option conversion ratio   100.00%        
Options, exercises in period, intrinsic value   $ 500,000 8,100,000      
Proceeds from stock option exercises   389,058 1,078,289      
Share-based compensation   $ 17,918,603 11,242,423      
Stock Option [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Award vesting period   3 years        
Share price   $ 0.72        
Unrecognized compensation expense, stock options   $ 29,500,000        
Unrecognized compensation expense, period for recognition   1 year 9 months 18 days        
Share-based compensation   $ 1,900,000        
Aggregate expense related to modifications   $ 25,000 $ 1,000,000.0      
Stock Option [Member] | Maximum [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Award term   10 years        
Stock Appreciation Rights (SARs) [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Vesting date Oct. 31, 2018          
Award term   10 years        
Exercise price per share   $ 0.95        
Vested shares   50,000 50,000      
Stock Appreciation Rights (SARs) [Member] | Employee [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Number of shares issued       50,000    
2008 Stock Incentive Plan [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Number of shares authorized   0        
2017 Equity Incentive Plan [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Number of shares authorized           4,700,000
Number of shares available   398,105        
2018 Equity Incentive Plan [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Number of shares authorized         18,500,000  
Number of shares available   2,593,491        
2022 Inducement Plan [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Number of shares authorized   4,000,000        
Number of shares available   3,901,250