Trade Accounts and Financing Receivables - Trade Accounts Receivable, Net (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Sep. 30, 2021
Current trade accounts receivable
Trade accounts receivable	$ 12,832	$ 12,635
Allowance for doubtful accounts	(542)	(428)
Total	$ 12,290	$ 12,207

Amount, before allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business, classified as current.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 2: http://www.xbrl.org/2003/role/exampleRef
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-Publisher FASB
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