Reportable Segments and Major Concentration Data - Pre-tax Earnings Table (Detail) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2020
Operating income (loss):	$ 54,391	$ 93,034	$ 61,324
Corporate operating expenses	(34,707)	(14,788)	(12,895)
Interest income	17	0	142
Interest expense	(1,189)	(1,878)	(2,632)
RADx initiative grant income	0	1,000	0
Other, net	1,098	(1,705)	459
Earnings Before Income Taxes	54,317	90,451	59,293
Operating Segments [Member]
Operating income (loss):	89,098	107,822	74,219
Operating Segments [Member] | Diagnostics [Member]
Operating income (loss):	2,982	(7,280)	5,276
Operating Segments [Member] | Life Science [Member]
Operating income (loss):	86,040	115,014	68,893
Eliminations [Member]
Operating income (loss):	$ 76	$ 88	$ 50