Note 6 - AMP Credits (Details Textual) $ in Thousands	3 Months Ended
	Mar. 31, 2026 USD ($)	Mar. 31, 2025 USD ($)
Increase (Decrease) in AMP Credit Receivable	$ 8	$ 33
Heavy Fabrications [Member]
Increase (Decrease) in AMP Credit Receivable	$ 2,772	$ 2,772
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	$ 180
AMP Credit, Miscellaneous Administrative Cost Incurred	21	28
AMP Credit, Miscellaneous Costs Incurred, Uncapitalized	$ 5	$ 12