Revenue - Summary of Disaggregation of Revenue Within Reportable Segment (Detail) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2020
Disaggregation Of Revenue [Line Items]
Total revenue	$ 99,951	$ 105,136	$ 94,864
Product Sales [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	54,621	46,478	44,317
Royalties [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	36,248	47,056	40,634
Research, Development and Other [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	9,082	11,602	9,913
Operating Segments [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	99,951	105,136	94,864
Operating Segments [Member] | Medical Device [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	72,389	78,253	71,401
Operating Segments [Member] | Medical Device [Member] | Product Sales [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	27,930	21,777	21,608
Operating Segments [Member] | Medical Device [Member] | Royalties [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	30,267	30,781	28,614
Operating Segments [Member] | Medical Device [Member] | License Fees [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	5,981	16,275	12,020
Operating Segments [Member] | Medical Device [Member] | Research, Development and Other [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	8,211	9,420	9,159
Operating Segments [Member] | In Vitro Diagnostics [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	27,562	26,883	23,463
Operating Segments [Member] | In Vitro Diagnostics [Member] | Product Sales [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	26,691	24,701	22,709
Operating Segments [Member] | In Vitro Diagnostics [Member] | Research, Development and Other [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	$ 871	$ 2,182	$ 754