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Note 7 - Acquisition of Lew Thompson & Son Trucking, Inc - Pro Forma Consolidated Results of Operations (Details) - Lew Thompson & Son Trucking, Inc. [Member] - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022
Total revenue | $ 1,124,492 |
Net income | $ 57,592 | $ 121,943
Basic net income per share (in dollars per share) | $ 4.41 | $ 8.13
Diluted net income per share (in dollars per share) | $ 4.16 | $ 7.86
Lew Thompson & Son Trucking, Inc. [Member] |  |
Total revenue |  | $ 1,281,504

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- Definition 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. + References 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 + Details
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