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Note 5 - AMP Credits (Details Textual) $ in Thousands	3 Months Ended
Note 5 - AMP Credits (Details Textual) $ in Thousands	Mar. 31, 2025 USD ($)	Mar. 31, 2024 USD ($)
Increase (Decrease) in AMP Credit Receivable	$ 33	$ (5,319)
Heavy Fabrications [Member]
Increase (Decrease) in AMP Credit Receivable	$ 2,772	$ 1,872
AMP Credit, Credit Per Watt of Wind Power Produced	0.03
AMP Credit, Discount on the Sale Of AMP Credits, Percentage	6.50%	6.50%
AMP Credit, Discount on the Sale of AMP Credits, Amount	$ 180	$ 122
AMP Credit, Miscellaneous Administrative Cost Incurred	28	33
AMP Credit, Miscellaneous Costs Incurred, Uncapitalized	$ 12	$ 42