Revenue - Summary of Revenues Disaggregated by Product Classification and Operating Segment (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2020	Mar. 31, 2019
Disaggregation Of Revenue [Line Items]
Total revenue	$ 22,822	$ 22,676	$ 45,438	$ 44,917
Product Sales [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	11,770	9,887	21,744	19,638
Royalties [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	8,221	9,932	18,369	20,028
Research, Development and Other [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	2,831	2,857	5,325	5,251
Operating Segments [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	22,822	22,676	45,438	44,917
Operating Segments [Member] | Medical Device [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	16,304	17,301	33,708	34,559
Operating Segments [Member] | Medical Device [Member] | Product Sales [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	5,455	4,558	10,477	9,336
Operating Segments [Member] | Medical Device [Member] | Royalties [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	6,714	8,313	15,613	15,998
Operating Segments [Member] | Medical Device [Member] | Research, Development and Other [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	2,628	2,811	4,862	5,195
Operating Segments [Member] | Medical Device [Member] | License Fees [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	1,507	1,619	2,756	4,030
Operating Segments [Member] | In Vitro Diagnostics [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	6,518	5,375	11,730	10,358
Operating Segments [Member] | In Vitro Diagnostics [Member] | Product Sales [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	6,315	5,329	11,267	10,302
Operating Segments [Member] | In Vitro Diagnostics [Member] | Other [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	$ 203	$ 46	$ 463	$ 56