Note 13 - Income Taxes (Details Textual) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Sep. 30, 2023
Income Tax Expense (Benefit)	$ (450)	$ (1,207)	$ (900)	$ (9,107)
Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Amount			1,700
Effective Income Tax Rate Reconciliation, Tax Expense (Benefit), Share-Based Payment Arrangement, Amount			500
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount			700		$ 2,000
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount	1,300		9,600
Effective Income Tax Rate Reconciliation, Tax Settlement, Foreign, Amount				1,400
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability	0	$ (1,404)	0	$ (18,549)
Effective Income Tax Rate Reconciliation, Repatriation of Foreign Earnings, Amount	5,200
Deferred Tax Liabilities, Undistributed Foreign Earnings	2,900		$ 2,900
Open Tax Year			2018 2019 2020 2021 2022 2023 2024
GERMANY
Foreign Earnings Repatriated	455,000
Effective Income Tax Rate Reconciliation, Repatriation of Foreign Earnings, Amount	3,200
State and Local Jurisdiction [Member]
Deferred Tax Assets, Valuation Allowance	$ 700		$ 700