Revenue - Summary of Disaggregation of Revenue Within Reportable Segment (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2024	Mar. 31, 2023
Disaggregation Of Revenue [Line Items]
Total revenue	$ 31,958	$ 27,198	$ 62,510	$ 52,131
Product Sales [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	18,099	15,350	36,926	29,584
Royalties [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	11,411	9,429	20,590	18,194
Research, Development and Other [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	2,448	2,419	4,994	4,353
Operating Segments [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	31,958	27,198	62,510	52,131
Operating Segments [Member] | Medical Device [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	24,826	19,707	48,371	38,725
Operating Segments [Member] | Medical Device [Member] | Product Sales [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	11,100	7,914	23,050	16,294
Operating Segments [Member] | Medical Device [Member] | Royalties [Member] | Performance Coatings [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	10,323	8,098	18,531	15,567
Operating Segments [Member] | Medical Device [Member] | License Fees [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	1,088	1,331	2,059	2,627
Operating Segments [Member] | Medical Device [Member] | Research, Development and Other [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	2,315	2,364	4,731	4,237
Operating Segments [Member] | In Vitro Diagnostics [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	7,132	7,491	14,139	13,406
Operating Segments [Member] | In Vitro Diagnostics [Member] | Product Sales [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	6,999	7,436	13,876	13,290
Operating Segments [Member] | In Vitro Diagnostics [Member] | Research, Development and Other [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	$ 133	$ 55	$ 263	$ 116