Accrued Expenses and Other Current Liabilities - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended		12 Months Ended
	Jun. 30, 2023	Jun. 30, 2023	Jun. 30, 2022	Sep. 30, 2022
Restructuring Cost and Reserve [Line Items]
Severance expenses		$ 2,296		$ 1,353
Employee Severance
Restructuring Cost and Reserve [Line Items]
Severance expenses	$ 1,800		$ 1,300