Revenue - Summary of Revenues Disaggregated by Product Classification and Operating Segment (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Disaggregation Of Revenue [Line Items]
Total revenue	$ 26,883	$ 24,344	$ 72,321	$ 69,261
Product Sales [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	11,987	9,870	33,731	29,508
Royalties [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	12,398	11,624	30,767	31,652
Research, Development and Other [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	2,498	2,850	7,823	8,101
Operating Segments [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	26,883	24,344	72,321	69,261
Operating Segments [Member] | Medical Device [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	20,514	18,945	54,222	53,504
Operating Segments [Member] | Medical Device [Member] | Product Sales [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	5,763	4,500	16,240	13,836
Operating Segments [Member] | Medical Device [Member] | Royalties [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	4,752	9,605	20,365	25,603
Operating Segments [Member] | Medical Device [Member] | Research, Development and Other [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	2,353	2,821	7,215	8,016
Operating Segments [Member] | Medical Device [Member] | License Fees [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	7,646	2,019	10,402	6,049
Operating Segments [Member] | In Vitro Diagnostics [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	6,369	5,399	18,099	15,757
Operating Segments [Member] | In Vitro Diagnostics [Member] | Product Sales [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	6,224	5,370	17,491	15,672
Operating Segments [Member] | In Vitro Diagnostics [Member] | Other [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	$ 145	$ 29	$ 608	$ 85