Note 2 - Revenues (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Revenue from Contract with Customer, Including Assessed Tax	$ 143,136	$ 203,477
Transferred over Time [Member] | Gearing [Member]
Revenue from Contract with Customer, Including Assessed Tax	1,059	5,370
Transferred over Time [Member] | Heavy Fabrications [Member]
Revenue from Contract with Customer, Including Assessed Tax	$ 5,983	$ 11,033	$ 1,955