Contingent Obligations and Non-Current Liabilities - Schedule of Government Grant Obligations Reflected in Condensed Consolidated Balance Sheet (Detail) - USD ($) $ in Thousands	Sep. 30, 2022	Sep. 30, 2021
Contingent Obligations and NonCurrent Liabilities Disclosure [Abstract]
Current liabilities	$ 667	$ 638
Liabilities, Noncurrent	$ 4,620	$ 5,176

xxx_Contingent Obligations and Non-Current Liabilities Disclosure [Abstract].

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