Revenue - Summary of Disaggregation of Revenue Within Reportable Segment (Detail) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Disaggregation Of Revenue [Line Items]
Total revenue	$ 30,552	$ 24,933
Product Sales [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	18,827	14,234
Royalties [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	9,179	8,765
Research, Development and Other [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	2,546	1,934
Operating Segments [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	30,552	24,933
Operating Segments [Member] | Medical Device [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	23,545	19,018
Operating Segments [Member] | Medical Device [Member] | Product Sales [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	11,950	8,380
Operating Segments [Member] | Medical Device [Member] | Royalties [Member] | Performance Coatings [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	8,208	7,469
Operating Segments [Member] | Medical Device [Member] | License Fees [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	971	1,296
Operating Segments [Member] | Medical Device [Member] | Research, Development and Other [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	2,416	1,873
Operating Segments [Member] | In Vitro Diagnostics [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	7,007	5,915
Operating Segments [Member] | In Vitro Diagnostics [Member] | Product Sales [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	6,877	5,854
Operating Segments [Member] | In Vitro Diagnostics [Member] | Research, Development and Other [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	$ 130	$ 61