Reportable Segments and Major Concentration Data - Segment Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2020
Segment Reporting Information [Line Items]
Net revenues	$ 333,018	$ 317,896	$ 253,667
Operating income (loss)	54,391	93,034	61,324
Depreciation and amortization	16,511	15,286	13,567
Capital expenditures	8,615	18,312	3,299
Goodwill	116,302	114,668	114,186
Other intangible assets, net	74,131	84,151	83,197
Total assets	463,097	449,722	405,261
Restructuring and litigation costs	20,298	2,803	2,080
Diagnostics [Member]
Segment Reporting Information [Line Items]
Net revenues	155,903	127,760	121,132
Life Science [Member]
Segment Reporting Information [Line Items]
Net revenues	177,115	190,136	132,535
Corporate [Member]
Segment Reporting Information [Line Items]
Operating income (loss)	(34,707)	(14,788)	(12,895)
Eliminations [Member]
Segment Reporting Information [Line Items]
Net revenues	(393)	(558)	(587)
Operating income (loss)	76	88	50
Total assets	(44)	(22)	(34)
Operating Segments [Member]
Segment Reporting Information [Line Items]
Operating income (loss)	89,098	107,822	74,219
Operating Segments [Member] | Diagnostics [Member]
Segment Reporting Information [Line Items]
Net revenues	155,903	127,760	121,132
Net revenues	255	351	326
Operating income (loss)	2,982	(7,280)	5,276
Depreciation and amortization	14,708	13,432	11,451
Capital expenditures	6,882	15,827	1,850
Goodwill	94,412	94,904	94,855
Other intangible assets, net	74,129	84,149	83,179
Total assets	357,630	339,208	306,812
Operating Segments [Member] | Life Science [Member]
Segment Reporting Information [Line Items]
Net revenues	177,115	190,136	132,535
Net revenues	138	207	261
Operating income (loss)	86,040	115,014	68,893
Depreciation and amortization	1,803	1,854	2,116
Capital expenditures	1,733	2,485	1,449
Goodwill	21,890	19,764	19,331
Other intangible assets, net	2	2	18
Total assets	$ 105,511	$ 110,536	$ 98,483