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Related party transactions
12 Months Ended
Sep. 30, 2021
Related party transactions  
Related party transactions

8.

Related party transactions

During the years ended September 30, 2021, 2020 and 2019, the Company purchased raw materials from a related party investor in the amount of $5.0 million, $3.4 million and $3.2 million, respectively. Payable balances and cash receipts and receivable balances with the related party were immaterial as of September 30, 2021, 2020 and 2019.