Restructuring Plan - Summary of Restructuring And Abandonment Costs Recorded In Consolidated Statements of Operations and Comprehensive Income (loss) (Details) $ in Thousands	12 Months Ended
	Sep. 30, 2023 USD ($)
Restructuring Cost and Reserve [Line Items]
Total restructuring and abandonment costs	$ 15,649
Research and development
Restructuring Cost and Reserve [Line Items]
Total restructuring and abandonment costs	6,556
Sales and marketing
Restructuring Cost and Reserve [Line Items]
Total restructuring and abandonment costs	5,635
General and administrative
Restructuring Cost and Reserve [Line Items]
Total restructuring and abandonment costs	$ 3,458