Stock-based compensation - Abveris Acquisition (Details) - USD ($) $ in Thousands		3 Months Ended			9 Months Ended		12 Months Ended
	Dec. 01, 2021	Jun. 30, 2023	Dec. 31, 2022	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Sep. 30, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock based compensation expense		$ 10,598		$ 19,859	$ 18,531	$ 60,263
Abveris
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards aggregate fair value	$ 20,100
Vesting period	2 years
Share-based payment arrangement, expense (credit)			$ 9,900
Abveris | Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)	231,876
Stock based compensation expense							$ 9,900