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Note 2 - Acquisitions (Details Textual) - USD ($) $ in Millions | Dec. 14, 2020 | Aug. 05, 2019 | Jan. 02, 2019 | Apr. 02, 2018
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Action Stainless & Alloys, Inc. [Member] |  |  |  |
Business Combination, Consideration Transferred, Total | $ 19.5 |  |  |
EZ-Dumper [Member] |  |  |  |
Payments to Acquire Businesses, Gross |  | $ 0.1 |  |
McCullough [Member] |  |  |  |
Business Combination, Consideration Transferred, Total |  |  | $ 11.0 |
Berlin Metals [Member] |  |  |  |
Business Combination, Consideration Transferred, Total |  |  |  | $ 21.9

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