Leases - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2022	Sep. 30, 2022
Operating lease right-of-use  assets	$ 561	$ 651
Additional operating lease term	3 years
Novato California [Member]
Operating lease right-of-use  assets	$ 1,100
Operating lease expiry date	Jul. 31, 2024
General and Administrative Expense [Member]
Right of use assets payments	$ 100