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Note 15 - Share-based Compensation - Summary of Share-based Compensation Expense (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
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Mar. 31, 2022 | Mar. 31, 2021 | Mar. 31, 2022 | Mar. 31, 2021
Share-based Payment Arrangement, Expense | $ 737 | $ 328 | $ 1,295 | $ 510
Cost of Sales [Member] |  |  |  |
Share-based Payment Arrangement, Expense | 28 | 9 | 43 | 15
Selling, General and Administrative Expenses [Member] |  |  |  |
Share-based Payment Arrangement, Expense | 686 | 309 | 1,217 | 479
Research and Development Expense [Member] |  |  |  |
Share-based Payment Arrangement, Expense | $ 23 | $ 10 | $ 35 | $ 16

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- Definition Amount of expense for award under share-based payment arrangement. Excludes amount capitalized. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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