Note 2 - Acquisitions - Pro Forma (Details) - Metal-Fab [Member] $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2023 USD ($) $ / shares
Net sales | $	$ 2,656,254
Net income (loss) | $	$ 94,619
Basic earnings per share (in dollars per share) | $ / shares	$ 8.19
Diluted earnings per share (in dollars per share) | $ / shares	$ 8.19
Historical OSI [Member]
Net sales | $	$ 2,559,990
Net income (loss) | $	$ 90,931
Basic earnings per share (in dollars per share) | $ / shares	$ 7.87
Diluted earnings per share (in dollars per share) | $ / shares	$ 7.87
Historical [Member]
Net sales | $	$ 95,528
Net income (loss) | $	$ 16,538
Basic earnings per share (in dollars per share) | $ / shares	$ 1.43
Diluted earnings per share (in dollars per share) | $ / shares	$ 1.43
Pro Forma [Member]
Net sales | $	$ 736
Net income (loss) | $	$ (12,850)
Basic earnings per share (in dollars per share) | $ / shares	$ (1.11)
Diluted earnings per share (in dollars per share) | $ / shares	$ (1.11)