v3.26.1
Stock-Based Compensation - Narrative (Details)
$ in Thousands
3 Months Ended 9 Months Ended
Jun. 30, 2026
USD ($)
plan
shares
Mar. 19, 2026
shares
Jun. 30, 2026
USD ($)
plan
shares
Jun. 30, 2025
USD ($)
Jun. 30, 2026
USD ($)
plan
shares
Jun. 30, 2025
USD ($)
shares
May 31, 2026
shares
Sep. 30, 2025
shares
Sep. 30, 2021
shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                  
Number of plans | plan 3   3   3        
Awards granted and outstanding (in shares) 6,624,830   6,624,830   6,624,830        
Granted (in shares)         0 0      
Common stock, share reserve for issuance (in shares) 11,372,310   11,372,310   11,372,310        
Number of options outstanding (in shares) 830,176   830,176   830,176     1,407,035  
Stock-based compensation expense | $     $ 14,974 $ 11,993 $ 51,132 $ 41,250      
Restricted stock units                  
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                  
Share-based payment award (in shares) 5,794,654   5,794,654   5,794,654     5,810,351  
Stock-based compensation expense | $     $ 15,000 11,900 $ 51,100 41,100      
Number of shares exchanged for each equity instrument 1   1   1        
Unrecognized pre-tax compensation expense | $ $ 158,800   $ 158,800   $ 158,800        
Weighted average period to recognize pre-tax compensation expense         2 years 6 months        
Options                  
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                  
Intrinsic value of options exercised | $     11,200 300 $ 23,800 4,900      
Stock-based compensation expense | $     $ 0 0 $ 0 100      
2013 Plan                  
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                  
Awards granted and outstanding (in shares) 1,580,277   1,580,277   1,580,277        
Number of shares forfeited (in shares)         170,898        
Number of options outstanding (in shares) 480,277   480,277   480,277        
2013 Plan | Restricted stock units                  
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                  
Share-based payment award (in shares) 1,100,000   1,100,000   1,100,000        
2021 Plan                  
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                  
Awards granted and outstanding (in shares) 4,034,289   4,034,289   4,034,289        
Number of shares authorized (in shares)                 18,500,000
Granted (in shares)         7,955,754        
Number of shares forfeited (in shares)         657,166        
Number of additional shares authorized (in shares)   10,500,000              
Number of options outstanding (in shares) 22,965   22,965   22,965        
2021 Plan | Restricted stock units                  
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                  
Share-based payment award (in shares) 4,011,324   4,011,324   4,011,324        
Inducement Plan                  
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                  
Number of shares authorized (in shares)             3,000,000    
Granted (in shares)         835,930        
Common stock, share reserve for issuance (in shares) 2,164,070   2,164,070   2,164,070        
Number of options outstanding (in shares) 326,934   326,934   326,934        
Inducement Plan | Restricted stock units                  
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                  
Share-based payment award (in shares) 41,225   41,225   41,225        
Visirna ESOP                  
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                  
Number of shares authorized (in shares) 20,000,000   20,000,000   20,000,000        
Granted (in shares) 16,400,000                
Stock-based compensation expense | $     $ 0 $ 1,100 $ 0 $ 3,000