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Note 16 - Income Taxes (Details Textual) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Sep. 30, 2025 | Jun. 30, 2025 | Mar. 31, 2025 | Dec. 31, 2024 | Sep. 30, 2024 | Jun. 30, 2024 | Mar. 31, 2024 | Dec. 31, 2023 | Mar. 31, 2025 | Mar. 31, 2024 | Jun. 30, 2025 | Jun. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2023
Effective Income Tax Rate Reconciliation, Deduction, Worthless Stock, Amount |  |  |  |  |  |  |  |  |  |  |  |  | $ 45,600 | $ (0) | $ (0)
Income Tax Expense (Benefit) | $ (45,353) | $ 2,635 | $ 7,243 | $ 3,874 | $ 2,036 | $ 573 | $ 1,292 | $ 1,340 | $ 11,117 | $ 2,632 | $ 13,752 | $ 3,205 | (31,601) | 5,241 | (11,965)
Effective Income Tax Rate Reconciliation, Repatriation of Foreign Earnings, Amount |  |  |  |  |  |  |  |  |  |  |  |  |  | 5,200 |
Amount of Benefit Offset by State Income Taxes, Net of the Federal Benefit |  |  |  |  |  |  |  |  |  |  |  |  |  | 2,000 |
Undistributed Earnings of Foreign Subsidiaries | 377,500 |  |  |  |  |  |  |  |  |  |  |  | 377,500 |  |
Deferred Income Tax Assets, Net | 726 |  |  |  | 837 |  |  |  |  |  |  |  | 726 | 837 | $ 657
Deferred Tax Assets, Valuation Allowance | 102,021 |  |  |  | 44,222 |  |  |  |  |  |  |  | 102,021 | 44,222 |
Decrease in Unrecognized Tax Benefits is Reasonably Possible | 300 |  |  |  |  |  |  |  |  |  |  |  | 300 |  |
Domestic Tax Jurisdiction [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred Tax Assets, Valuation Allowance | 27,900 |  |  |  |  |  |  |  |  |  |  |  | 27,900 |  |
Operating Loss Carryforwards | 4,400 |  |  |  |  |  |  |  |  |  |  |  | 4,400 |  |
Foreign Tax Jurisdiction [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred Tax Assets, Valuation Allowance | 74,100 |  |  |  |  |  |  |  |  |  |  |  | 74,100 |  |
Operating Loss Carryforwards | 74,900 |  |  |  |  |  |  |  |  |  |  |  | 74,900 |  |
State and Local Jurisdiction [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Operating Loss Carryforwards | 7,400 |  |  |  |  |  |  |  |  |  |  |  | 7,400 |  |
Intercompany Profit Elimination [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred Income Tax Assets, Net | 300 |  |  |  | $ 600 |  |  |  |  |  |  |  | 300 | 600 |
Changes in Foreign Exchange Rates [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount |  |  |  |  |  |  |  |  |  |  |  |  |  | (2,900) |
GERMANY |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Foreign Earnings Repatriated |  |  |  |  |  |  |  |  |  |  |  |  |  | 455,000 |
Income Tax Expense (Benefit) |  |  |  |  |  |  |  |  |  |  |  |  |  | $ (3,200) |
CHINA |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Foreign Earnings Repatriated |  |  |  |  |  |  |  |  |  |  |  |  | 41,100 |  |
Income Tax Expense (Benefit) |  |  |  |  |  |  |  |  |  |  |  |  | 6,400 |  |
Authorized Future Foreign Earnings Repatriated | $ 21,500 |  |  |  |  |  |  |  |  |  |  |  | $ 21,500 |  |

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