Stock-Based Compensation - Schedule of Awards Outstanding (Details) - shares	Dec. 31, 2025	Sep. 30, 2025
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Options (in shares)	1,110,353	1,407,035
Total (in shares)	7,011,750
Restricted stock units
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Restricted stock units (in shares)	5,901,397	5,810,351
2013 Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Options (in shares)	621,592
Total (in shares)	1,721,592
2013 Plan | Restricted stock units
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Restricted stock units (in shares)	1,100,000
2021 Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Options (in shares)	32,151
Total (in shares)	4,080,143
2021 Plan | Restricted stock units
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Restricted stock units (in shares)	4,047,992
Inducement Awards
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Options (in shares)	456,610
Total (in shares)	1,210,015
Inducement Awards | Restricted stock units
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Restricted stock units (in shares)	753,405