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Note 15 - Commitments and Contingencies (Details Textual) - USD ($) | Jun. 23, 2023 | May 03, 2023 | Aug. 01, 2022 | Jun. 30, 2023 | Dec. 31, 2022 | Oct. 07, 2022
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Amount Financed by Dealers |  |  |  | $ 166,900 | $ 212,200 |
Power Home Solar, LLC [Member] | Collectibility of Receivables [Member] |  |  |  |  |  |
Accounts Receivable, before Allowance for Credit Loss |  |  |  |  |  | $ 17,700
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 |  |  | $ 25,000.0 |  |  |
Case Nos. 21-cv-00428-ADA and 20-cv-00078-ADA [Member] |  |  |  |  |  |
Litigation Settlement, Amount Awarded to Other Party | $ 5,400,000 |  |  |  |  |

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