Business acquisition - Assets acquired and liabilities assumed (Details) - USD ($) $ in Thousands	Dec. 01, 2021	Dec. 31, 2022	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
Contingent consideration	8,500
Holdback liabilities	12,838
Net working capital adjustment	(674)
Fair value of purchase consideration	$ 102,645