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Note 1 - Nature of Operations (Details Textual) € in Thousands |  |  |  |  | 3 Months Ended | 7 Months Ended | 9 Months Ended |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Mar. 13, 2024 USD ($) | Mar. 13, 2024 EUR (€) | Mar. 12, 2024 USD ($) shares | Mar. 12, 2024 EUR (€) shares | May 11, 2023 USD ($) shares | Mar. 08, 2023 | Jun. 30, 2023 USD ($) | Sep. 30, 2024 USD ($) | Sep. 30, 2024 EUR (€) | Sep. 30, 2024 USD ($) | Mar. 12, 2024 EUR (€)
Number of Operating Segments |  |  |  |  |  | 2 |  |  |  | 3 |
Stock Issued During Period, Value, New Issues |  |  |  |  |  |  | $ 19,244,000 |  |  |  |
At-the-Market Issuance Sales Agreement [Member] |  |  |  |  |  |  |  |  |  |  |
Stock Issued During Period, Shares, New Issues (in shares) | shares |  |  |  |  | 921,797 |  |  |  |  |  |
Aggregate Offering Price of Stock |  |  |  |  | $ 20,000 |  |  |  |  |  |
Stock Issued During Period, Value, New Issues |  |  |  |  | $ 19,244 |  |  |  |  |  |
Commission Fee, Percentage of Gross Proceeds |  |  |  |  | 3.00% |  |  |  |  |  |
Alfamation [Member] |  |  |  |  |  |  |  |  |  |  |
Business Combination, Consideration Transferred |  |  |  | € 20,000 |  |  |  | $ 21,901,000 |  |  |
Payments to Acquire Businesses, Gross |  |  | $ 19,674,000 | € 18,000 |  |  |  |  |  |  |
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares (in shares) | shares |  |  | 187,432 | 187,432 |  |  |  |  |  |  |
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable |  |  | $ 2,086,000 |  |  |  |  |  |  |  |
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Consideration Transferred | $ 141,000 | € 129 |  |  |  |  |  | 141,000 | € 129 |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities, Debt |  |  | $ 11,274,000 |  |  |  |  | $ 11,274,000 |  | $ 11,274,000 | € 10,315

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