Selected Balance Sheet Data (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Sep. 30, 2015
Accounts receivable, net:
Accounts receivable	$ 28,739	$ 28,073
Less allowance for doubtful accounts	203	285
Accounts receivable, net	28,536	27,788
Inventories:
Raw materials	21,276	26,037
Work in process	228	598
Finished goods	4,453	5,242
Inventories	$ 25,957	$ 31,877

Amounts due from customers or clients, within one year of the balance sheet date (or the normal operating cycle, whichever is longer) for goods or services (including trade receivables) that have been delivered or sold in the normal course of business.

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Amount due from customers or clients, within one year of the balance sheet date (or the normal operating cycle, whichever is longer), for goods or services (including trade receivables) that have been delivered or sold in the normal course of business, reduced to the estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection.

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A valuation allowance for trade and other receivables due to an Entity within one year (or the normal operating cycle, whichever is longer) that are expected to be uncollectible.

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Carrying amount, net of valuation reserves and adjustments, as of the balance sheet date of merchandise or goods held by the company that are readily available for sale.

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Amount after valuation and LIFO reserves of inventory expected to be sold, or consumed within one year or operating cycle, if longer.

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