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Note 16 - Income Taxes (Details Textual) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Sep. 30, 2024 | Sep. 30, 2023
Cash and Cash Equivalents, at Carrying Value | $ 6,895 | $ 18,803
Deferred Tax Liability Not Recognized, Amount of Unrecognized Deferred Tax Liability, Undistributed Earnings of Foreign Subsidiaries | 1,200 | 8,200
Domestic Tax Jurisdiction [Member] |  |
Deferred Tax Assets, Valuation Allowance | $ 40,851 |
Foreign Tax Jurisdiction [Member] |  |
Deferred Tax Assets, Valuation Allowance |  | 38,917
Internal Revenue Service (IRS) [Member] | Domestic Tax Jurisdiction [Member] |  |
Open Tax Year | 2017 2018 2019 2020 2021 2022 2023 2024 |
Operating Loss Carryforwards | $ 85,600 |
Operating Loss Carryforwards, Subject to Expiration | 32,400 |
Operating Loss Carryforwards, Not Subject to Expiration | 53,200 |
Deferred Tax Assets, Valuation Allowance | $ 36,100 | 33,700
His Majesty's Revenue and Customs (HMRC) [Member] | Foreign Tax Jurisdiction [Member] |  |
Open Tax Year | 2023 2024 |
Canada Revenue Agency [Member] | Foreign Tax Jurisdiction [Member] |  |
Open Tax Year | 2022 2021 2022 2023 2024 |
Operating Loss Carryforwards | $ 19,200 |
Deferred Tax Assets, Valuation Allowance | 4,800 | 4,800
The Federal Taxation Service [Member] | Foreign Tax Jurisdiction [Member] |  |
Deferred Tax Assets, Valuation Allowance |  | $ 400
Non-US [Member] |  |
Cash and Cash Equivalents, at Carrying Value | $ 1,100 |

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