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Note 15 - Share-based Compensation - Summary of Share-based Compensation Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Share-Based Payment Arrangement, Expense	$ 1,642	$ 2,227
Cost of Sales [Member]
Share-Based Payment Arrangement, Expense	111	77
Selling, General and Administrative Expenses [Member]
Share-Based Payment Arrangement, Expense	1,428	2,080
Research and Development Expense [Member]
Share-Based Payment Arrangement, Expense	$ 103	$ 70

X

- Definition

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 14.F)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479830/718-10-S99-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (h)(1)(i)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480429/718-10-50-2

+ Details

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X

- Details

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X

- Details

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