Collaborative Arrangement - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended			12 Months Ended
	Dec. 31, 2023	Jun. 30, 2023	Dec. 31, 2022	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2023
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
Total revenue	$ 30,552		$ 24,933
Revenue recognized included in deferred revenue balance at beginning of period	1,000
Deferred revenue, total	5,700
Royalties and License Fees [Member]
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
Total revenue	9,179		8,765
Abbott Agreement [Member]
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
Collaborative arrangement payment received	$ 87,800
Revenue recognized included in deferred revenue balance at beginning of period			$ 1,300
Deferred revenue, total								$ 6,800
Abbott Agreement [Member] | Upfront Payment [Member]
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
Collaborative arrangement payment received							$ 25,000
Abbott Agreement [Member] | Milestone Payment [Member]
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
Collaborative arrangement payment received		$ 27,000		$ 15,000	$ 10,800	$ 10,000