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Note 7 - Segment Reporting (Details Textual) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2024 USD ($) | Mar. 31, 2023 USD ($) | Dec. 31, 2023
Number of Reportable Segments |  | 2 |  |
Provision for Product Charges | [1] | $ (2,535) | $ (5,800) |
Geographic Concentration Risk [Member] | Revenue Benchmark [Member] | UNITED STATES |  |  |  |
Concentration Risk, Percentage |  | 76.00% | 75.00% |
Geographic Concentration Risk [Member] | Long-lived Assets [Member] | UNITED STATES |  |  |  |
Concentration Risk, Percentage |  | 74.00% |  | 74.00%
Patents and Securites [Member] |  |  |  |
Provision for Product Charges |  | $ 2,170 |  |
Clean Energy Product [Member] |  |  |  |
Provision for Product Charges |  | 365 |  |
Product [Member] |  |  |  |
Provision for Product Charges |  | $ 5,800 |  |
[1] | Represents the following significant and unusual charges not indicative of our ongoing operations: • A provision for judgments and legal expenses related to certain patent lawsuits - $2,170 in 2024. • Additional customer support costs related to a clean energy product customer that filed for bankruptcy in 2022 – $365 in 2024. • A provision for a matter with the Consumer Product Safety Commission ("CPSC") concerning the imposition of civil fines for allegedly failing to timely submit a report under the Consumer Product Safety Act ("CPSA") in relation to certain portable generators that were subject to a voluntary recall previously announced on July 29, 2021 - $5,800 in the first quarter 2023.

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