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Note 16 - Segment Reporting (Details Textual) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2023 USD ($)	Sep. 30, 2023 USD ($)	Jun. 30, 2023 USD ($)	Mar. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Sep. 30, 2022 USD ($)	Jun. 30, 2022 USD ($)	Mar. 31, 2022 USD ($)	Dec. 31, 2023 USD ($) MWh	Dec. 31, 2022 USD ($)
Revenue from Contract with Customer, Including Assessed Tax	$ 46,598	$ 57,163	$ 50,843	$ 48,873	$ 40,060	$ 44,843	$ 50,012	$ 41,844	$ 203,477	$ 176,759
Customer Concentration Risk [Member]
Number of Major Customers									5	5
Customer Concentration Risk [Member] \| Revenue Benchmark [Member]
Number of Major Customers									5	5
Customer Concentration Risk [Member] \| Revenue Benchmark [Member] \| Five Largest Customers [Member]
Concentration Risk, Percentage									65.00%	69.00%
Heavy Fabrications [Member]
Number of Facilities									2
Number of Tower Sections in Production Capacity of Turbines Total									1,650
Heavy Fabrications [Member] \| Customer One [Member]
Revenue from Contract with Customer, Including Assessed Tax									$ 88,144	$ 64,625
Heavy Fabrications [Member] \| Customer Concentration Risk [Member]
Number of Major Customers										2
Heavy Fabrications [Member] \| Customer Two [Member]
Revenue from Contract with Customer, Including Assessed Tax										$ 20,336
Heavy Fabrications [Member] \| Maximum [Member]
Annual Tower Production Capacity									550
Heavy Fabrications [Member] \| Minimum [Member]
Power Generating Capacity of Turbines (Megawatt-Hour) \| MWh									1,100