Revenue - Summary of Revenues Disaggregated by Product Classification and Operating Segment (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Disaggregation Of Revenue [Line Items]
Total revenue	$ 24,344	$ 22,227	$ 69,261	$ 58,298
Product Sales [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	9,870	10,475	29,508	27,249
Royalties [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	11,624	9,597	31,652	25,101
Research, Development and Other [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	2,850	2,155	8,101	5,948
Operating Segments [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	24,344	22,227	69,261	58,298
Operating Segments [Member] | Medical Device [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	18,945	16,701	53,504	43,527
Operating Segments [Member] | Medical Device [Member] | Product Sales [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	4,500	4,958	13,836	12,495
Operating Segments [Member] | Medical Device [Member] | Royalties [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	9,605	7,730	25,603	22,663
Operating Segments [Member] | Medical Device [Member] | Research, Development and Other [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	2,821	2,146	8,016	5,931
Operating Segments [Member] | Medical Device [Member] | License Fees [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	2,019	1,867	6,049	2,438
Operating Segments [Member] | In Vitro Diagnostics [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	5,399	5,526	15,757	14,771
Operating Segments [Member] | In Vitro Diagnostics [Member] | Product Sales [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	5,370	5,517	15,672	14,754
Operating Segments [Member] | In Vitro Diagnostics [Member] | Other [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	$ 29	$ 9	$ 85	$ 17