Selected Balance Sheet Data (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Sep. 30, 2021
Accounts receivable, net:
Accounts receivable	$ 57,863	$ 51,828
Less allowance for credit losses	3,827	3,934
Less reserve for future credit returns and pricing adjustments	4,677	4,156
Accounts receivable, net	49,359	43,738
Inventories:
Raw materials	31,707	27,279
Finished goods	20,167	16,642
Inventories	$ 51,874	$ 43,921