Selected Balance Sheet Data (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Sep. 30, 2018	[1]
Accounts receivable, net:
Accounts receivable	$ 48,747	$ 53,164
Less allowance for doubtful accounts	1,349	785
Less reserve for future returns and pricing adjustments	2,677	2,560
Accounts receivable, net	44,721	49,819
Inventories:
Raw materials	15,494	22,047
Work in process	649	525
Finished goods	25,653	19,072
Inventories	$ 41,796	$ 41,644

[1] Prior period information has been restated for the adoption of ASU No. 2014-09, “Revenue from Contracts with Customers (Topic 606),” which we adopted on October 1, 2018.