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Note 16 - Income Taxes (Details Textual) - USD ($) | 3 Months Ended | 9 Months Ended
--- | --- | ---
Mar. 31, 2023 | Mar. 31, 2022 | Sep. 30, 2022
Income Tax Expense (Benefit), Total | $ 92,000 | $ (599,000) | $ (92,000,000,000)
Effective Income Tax Rate Reconciliation, Percent, Total |  |  | 0.70%
Effective Income Tax Rate Reconciliation, Tax Expense (Benefit), Share-Based Payment Arrangement, Amount |  |  | $ 505,000
Effective Income Tax Rate Reconciliation, Tax Credit, Research, Amount |  |  | $ 1.1
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent | 21.00% |  |
Deferred Tax Assets, Valuation Allowance | $ 40,100,000 |  |

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