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