Selected Balance Sheet Data (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Sep. 30, 2018	[1]
Accounts receivable, net:
Accounts receivable	$ 49,698	$ 52,792
Less allowance for doubtful accounts	797	413
Less reserve for future returns and pricing adjustments	2,530	2,560
Accounts receivable, net	46,371	49,819
Inventories:
Raw materials	19,427	22,047
Work in process	807	525
Finished goods	26,802	19,072
Inventories	$ 47,036	$ 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.