Note 2 - Acquisitions - Pro Forma (Details) - Metal-Fab [Member] - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2022	Sep. 30, 2022
Net sales	$ 660,424	$ 2,113,103
Net income (loss)	$ 14,252	$ 89,805
Basic earnings per share (in dollars per share)	$ 1.23	$ 7.78
Diluted earnings per share (in dollars per share)	$ 1.23	$ 7.78
Historical OSI [Member]
Net sales	$ 634,437	$ 2,039,946
Net income (loss)	$ 12,046	$ 86,972
Basic earnings per share (in dollars per share)	$ 1.04	$ 7.53
Diluted earnings per share (in dollars per share)	$ 1.04	$ 7.53
Historical [Member]
Net sales	$ 25,803	$ 72,605
Net income (loss)	$ 5,023	$ 12,868
Basic earnings per share (in dollars per share)	$ 0.43	$ 1.11
Diluted earnings per share (in dollars per share)	$ 0.43	$ 1.11
Pro Forma [Member]
Net sales	$ 184	$ 552
Net income (loss)	$ (2,817)	$ (10,035)
Basic earnings per share (in dollars per share)	$ (0.24)	$ (0.86)
Diluted earnings per share (in dollars per share)	$ (0.24)	$ (0.86)

The pro forma basic net income per share for a period as if the business combination or combinations had been completed at the beginning of a period.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (h)(2)
-SubTopic 10
-Topic 805
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479328/805-10-50-2

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (h)(3)
-SubTopic 10
-Topic 805
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479328/805-10-50-2

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+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 805
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (h)(2)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479328/805-10-50-2

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 805
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (h)(3)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479328/805-10-50-2

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