Business acquisition - Assets acquired and liabilities assumed (Details) - USD ($) $ in Thousands		3 Months Ended
	Dec. 01, 2021	Jun. 30, 2023	Sep. 30, 2022	Sep. 30, 2021
Liabilities assumed
Goodwill		$ 85,811	$ 85,811	$ 22,434
Abveris
Assets acquired
Cash and cash equivalents	$ 1,306
Accounts receivable	2,309
Other current assets and prepaid expenses	1,654
Property, plant and equipment	1,078
Other non-current assets	2,970
Intangible assets	46,500
Liabilities assumed
Current liabilities	3,549
Non-current liabilities	846
Deferred tax liability	10,545
Fair value of assets acquired and liabilities assumed	40,877
Goodwill	61,768
Total purchase price	102,645
Consideration transferred
Cash	9,467
Company common stock	72,514	$ 1,800
Contingent consideration	8,500
Holdback liabilities	12,838
Net working capital adjustment	(674)
Fair value of purchase consideration	$ 102,645