Stock-Based Compensation and Equity Grants - Narrative (Details) - shares	3 Months Ended		6 Months Ended
	Mar. 31, 2026	Mar. 31, 2025	Mar. 31, 2026	Mar. 31, 2025
2025 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares available for grant (in shares)	1,000,000.0		1,000,000.0
Employee Stock Option | 2025 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expiration term of share-based compensation plan			10 years
Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of restricted units granted (in shares)	0	0	427,046	312,906
Expected term (years)			3 years	3 years
Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of restricted units granted (in shares)			380,338	156,453
Service Based Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of restricted units granted (in shares)			46,708
Service Based Restricted Stock Units | NEO
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of restricted units granted (in shares)				156,453