Revenue - Summary of Disaggregation of Revenue Within Reportable Segment (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Disaggregation Of Revenue [Line Items]
Total revenue	$ 30,341	$ 52,483	$ 92,851	$ 104,614
Product Sales [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	17,562	15,667	54,488	45,251
Royalties [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	10,458	34,153	31,048	52,347
Research, Development and Other [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	2,321	2,663	7,315	7,016
Operating Segments [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	30,341	52,483	92,851	104,614
Operating Segments [Member] | Medical Device [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	23,383	46,014	71,754	84,739
Operating Segments [Member] | Medical Device [Member] | Product Sales [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	10,726	9,299	33,776	25,593
Operating Segments [Member] | Medical Device [Member] | Royalties [Member] | Performance Coatings [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	9,324	8,286	27,855	23,853
Operating Segments [Member] | Medical Device [Member] | License Fees [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	1,134	25,867	3,193	28,494
Operating Segments [Member] | Medical Device [Member] | Research, Development and Other [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	2,199	2,562	6,930	6,799
Operating Segments [Member] | In Vitro Diagnostics [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	6,958	6,469	21,097	19,875
Operating Segments [Member] | In Vitro Diagnostics [Member] | Product Sales [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	6,836	6,368	20,712	19,658
Operating Segments [Member] | In Vitro Diagnostics [Member] | Research, Development and Other [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	$ 122	$ 101	$ 385	$ 217