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Note 14 - Commitments and Contingencies (Details Textual) - USD ($) $ in Thousands | Oct. 05, 2023 | May 03, 2023 | Aug. 01, 2022 | Jun. 30, 2025 | Dec. 31, 2024 | Mar. 31, 2024 | Dec. 31, 2023
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Amount Financed by Dealers |  |  |  | $ 167,176 | $ 165,432 |  |
Consumer Product Safety Commission [Member] |  |  |  |  |  |  |
Settlement Agreement, Civil Fine Payments |  | $ 15,800 |  |  |  |  |
Power Home Solar, LLC Against Generac Power Systems, Inc. [Member] | Minimum [Member] |  |  |  |  |  |  |
Loss Contingency, Damages Sought, Value |  |  | $ 25,000 |  |  |  |
Case No. 22-cv-00072-JRG [Member] |  |  |  |  |  |  |
Litigation Settlement, Amount Awarded to Other Party | $ 11,500 |  |  |  |  |  |
Loss Contingency Accrual |  |  |  |  |  |  | $ 12,669
Case No. 22-cv-00072-JRG [Member] | Estimated Prejudgment Interest [Member] |  |  |  |  |  |  |
Loss Contingency Accrual |  |  |  |  |  | $ 1,826 |

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