Amount of asset segregated and restricted to provide benefit under defined benefit plan. Asset includes, but is not limited to, stock, bond, other investment, earning from investment, and contribution by employer and employee.

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- Definition

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Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan.

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Note 18 - Retirement Plans (Details Textual) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2005
Defined Contribution Plan, Administrative Expense	$ 4.6	$ 4.7	$ 4.1
Supplemental Employee Retirement Plan [Member]
Defined Contribution Plan Vesting Period (Year)	7 years
Defined Benefit Plan, Plan Assets, Amount	$ 15.1	$ 11.6
Supplemental Employee Retirement Plan [Member] \| Maximum [Member]
Defined Contribution Plan, Compensation Percentage Multiplier				13.00%
Non-union Flat Rolled Segments’ 401K Retirement Plan [Member]
Defined Contribution Plan, Employer Matching Contribution, Percent of Match	50.00%
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay	6.00%
Metal-Fab 401(k) Retirement Plans [Member] \| First Step of Percent Match [Member]
Defined Contribution Plan, Employer Matching Contribution, Percent of Match	50.00%
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay	5.00%
Action Stainless & Alloy’s 401(k) Retirement Plans [Member]
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay	4.00%
Action Stainless & Alloy’s 401(k) Retirement Plans [Member] \| First Step of Percent Match [Member]
Defined Contribution Plan, Employer Matching Contribution, Percent of Match	100.00%
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay	3.00%
Action Stainless & Alloy’s 401(k) Retirement Plans [Member] \| Second Step of Percent Match [Member]
Defined Contribution Plan, Employer Matching Contribution, Percent of Match	50.00%
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay	2.00%