Geographic, product and industry information - By Product (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	$ 48,127	$ 31,204	$ 90,145	$ 59,364
Synthetic genes
Segment Reporting Information [Line Items]
Revenue	14,163	9,189	27,688	18,064
Oligo pools
Segment Reporting Information [Line Items]
Revenue	2,308	1,841	5,496	3,351
DNA libraries
Segment Reporting Information [Line Items]
Revenue	1,967	1,940	3,228	3,041
Antibody discovery
Segment Reporting Information [Line Items]
Revenue	6,587	1,283	11,400	2,386
NGS tools
Segment Reporting Information [Line Items]
Revenue	$ 23,102	$ 16,951	$ 42,333	$ 32,522