Leasing Arrangements - Schedule of Condensed Income Statement Of Operation (Detail) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Condensed Income Statements, Captions [Line Items]
Right-of-use assets, net obtained in exchange for operating lease liabilities	$ 3,068	$ 1,073
Lease costs within cost of sales
Condensed Income Statements, Captions [Line Items]
Operating lease cost	905	795
Lease costs within operating expenses
Condensed Income Statements, Captions [Line Items]
Operating lease cost	$ 1,406	$ 1,542