Revenue - Summary of Revenues Disaggregated by Product Classification and Reportable Segment (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2021	Mar. 31, 2020
Disaggregation Of Revenue [Line Items]
Total revenue	$ 34,995	$ 22,822	$ 57,292	$ 45,438
Product Sales [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	11,783	11,770	21,885	21,744
Royalties [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	20,052	8,221	29,386	18,369
Research, Development and Other [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	3,160	2,831	6,021	5,325
Operating Segments [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	34,995	22,822	57,292	45,438
Operating Segments [Member] | Medical Device [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	27,907	16,304	44,103	33,708
Operating Segments [Member] | Medical Device [Member] | Product Sales [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	5,410	5,455	9,971	10,477
Operating Segments [Member] | Medical Device [Member] | Royalties [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	7,474	6,714	15,383	15,613
Operating Segments [Member] | Medical Device [Member] | Research, Development and Other [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	2,445	2,628	4,746	4,862
Operating Segments [Member] | Medical Device [Member] | License Fees [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	12,578	1,507	14,003	2,756
Operating Segments [Member] | In Vitro Diagnostics [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	7,088	6,518	13,189	11,730
Operating Segments [Member] | In Vitro Diagnostics [Member] | Product Sales [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	6,373	6,315	11,914	11,267
Operating Segments [Member] | In Vitro Diagnostics [Member] | Research, Development and Other [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	$ 715	$ 203	$ 1,275	$ 463