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Balance sheet components - Other current liabilities (Details) - USD ($)
$ in Thousands
Dec. 31, 2022
Sep. 30, 2022
Balance Sheet Related Disclosures [Abstract]    
Indemnity holdbacks $ 7,557 $ 9,592
Income and sales taxes payable 3,761 3,661
Deferred revenue 3,683 3,476
Contingent consideration 0 2,100
Other current liabilities 821 908
Other current liabilities $ 15,822 $ 19,737