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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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Represents a specific credit loss provision for a clean energy product customer that filed for bankruptcy, as well as a warranty provision to address certain clean energy product warranty-related matters

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