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Note 1 - Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2024

Notes Tables

Disaggregation of Revenue [Table Text Block]

		Year ended December 31,
(in thousands)		2024				2023				2022
Revenues:
Expedited		$	416,461			$	423,820			$	452,713
Dedicated			364,414				320,287				362,997
Managed Freight			248,939				258,903				320,985
Warehousing			101,662				100,563				80,163
Total revenues		$	1,131,476			$	1,103,573			$	1,216,858

Accounts Receivable, Allowance for Credit Loss [Table Text Block]

Years ended December 31:		Beginning balance January 1,				(Reversal of) additional provisions to allowance				Write-offs and other adjustments				Ending balance December 31,
2024		$	2,449			$	(23	)		$	(66	)		$	2,360
2023		$	2,934			$	(258	)		$	(227	)		$	2,449
2022		$	4,112			$	367			$	(1,545	)		$	2,934

Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]

(in thousands except per share data)
		2024				2023				2022
Numerators:
Income from continuing operations		$	35,321			$	54,629			$	107,932
Income from discontinued operations, net of tax			600				600				750
Net income		$	35,921			$	55,229			$	108,682
Denominator:
Denominator for basic income per share – weighted-average shares			26,307				26,096				30,012
Effect of dilutive securities:
Equivalent shares issuable upon conversion of unvested restricted shares			161				489				715
Equivalent shares issuable upon conversion of unvested employee stock options			1,246				1,083				321
Denominator for diluted income per share adjusted weighted-average shares and assumed conversions			27,714				27,668				31,048
Basic income per share:
Income from continuing operations		$	1.35			$	2.09			$	3.60
Income from discontinued operations		$	0.02			$	0.02			$	0.02
Net income per basic share(1)		$	1.37			$	2.12			$	3.62
Diluted income per share:
Income from continuing operations		$	1.28			$	1.97			$	3.48
Income from discontinued operations		$	0.02			$	0.02			$	0.02
Net income per diluted share		$	1.30			$	2.00			$	3.50

X

- Definition

Tabular disclosure of allowance for credit loss on accounts receivable.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-13

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Tabular disclosure of disaggregation of revenue into categories depicting how nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factor.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
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+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 260
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (a)
-Publisher FASB
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