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Balance sheet components - Other current liabilities (Details) - USD ($)
$ in Thousands
Sep. 30, 2021
Sep. 30, 2020
Balance sheet components    
Contingent consideration $ 5,186  
Income and sales taxes payable 2,440 $ 719
Other current liabilities 1,997 1,892
Other current liabilities $ 9,623 $ 2,611