Note 1 - Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2023

Notes Tables

Disaggregation of Revenue [Table Text Block]

	Year ended December 31,
(in thousands)	2023		2022		2021
Revenues:
Expedited	$	423,820	$	452,713	$	337,063
Dedicated		320,287		362,997		324,541
Managed Freight		258,903		320,985		321,236
Warehousing		100,563		80,163		63,163
Total revenues	$	1,103,573	$	1,216,858	$	1,046,003

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,
2023	$	2,934	$	(258	)	$	(227	)	$	2,449
2022	$	4,112	$	367		$	(1,545	)	$	2,934
2021	$	2,992	$	1,338		$	(218	)	$	4,112

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

(in thousands except per share data)
	2023		2022		2021
Numerators:
Income from continuing operations	$	54,629	$	107,932	$	58,191
Income from discontinued operations, net of tax		600		750		2,540
Net income	$	55,229	$	108,682	$	60,731
Denominator:
Denominator for basic income per share – weighted-average shares		13,048		15,006		16,803
Effect of dilutive securities:
Equivalent shares issuable upon conversion of unvested restricted shares		245		358		217
Equivalent shares issuable upon conversion of unvested employee stock options		541		160		-
Denominator for diluted income per share adjusted weighted-average shares and assumed conversions		13,834		15,524		17,020
Basic income per share:
Income from continuing operations	$	4.19	$	7.19	$	3.46
Income from discontinued operations	$	0.05	$	0.05	$	0.15
Net income per basic share(1)	$	4.23	$	7.24	$	3.61
Diluted income per share:
Income from continuing operations	$	3.95	$	6.95	$	3.42
Income from discontinued operations	$	0.04	$	0.05	$	0.15
Net income per diluted share	$	3.99	$	7.00	$	3.57