Revenue Recognition - Summary of Disaggregation of Revenue by Product Platform/Type (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2022	Mar. 31, 2021
Segment Reporting Information [Line Items]
Revenue	$ 111,231	$ 85,264	$ 199,572	$ 178,181
Revenue, % change	30.00%		12.00%
Diagnostics [Member]
Segment Reporting Information [Line Items]
Revenue	$ 41,103	31,949	$ 74,307	62,270
Revenue, % change	29.00%		19.00%
Diagnostics [Member] | Molecular Assays [Member]
Segment Reporting Information [Line Items]
Revenue	$ 4,385	4,395	$ 9,137	8,985
Revenue, % change	0.00%		2.00%
Diagnostics [Member] | Non-molecular assays
Segment Reporting Information [Line Items]
Revenue	$ 36,718	27,554	$ 65,170	53,285
Revenue, % change	33.00%		22.00%
Life Science [Member]
Segment Reporting Information [Line Items]
Revenue	$ 70,128	53,315	$ 125,265	115,911
Revenue, % change	32.00%		8.00%
Life Science [Member] | Molecular Reagents [Member]
Segment Reporting Information [Line Items]
Revenue	$ 40,334	37,752	$ 71,822	83,776
Revenue, % change	7.00%		(14.00%)
Life Science [Member] | Immunological Reagents [Member]
Segment Reporting Information [Line Items]
Revenue	$ 29,794	$ 15,563	$ 53,443	$ 32,135
Revenue, % change	91.00%		66.00%