Note 1 - Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2022

Notes Tables

Disaggregation of Revenue [Table Text Block]

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

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

Years ended December 31:	Beginning balance January 1,		Additional provisions to allowance		Write-offs and other adjustments			Ending balance December 31,
2022	$	4,112	$	367	$	(1,544	)	$	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)
	2022		2021
Numerators:
Income from continuing operations	$	107,932	$	58,191
Income from discontinued operations, net of tax		750		2,540
Net income	$	108,682	$	60,731
Denominator:
Denominator for basic income per share – weighted-average shares		15,006		16,803
Effect of dilutive securities:
Equivalent shares issuable upon conversion of unvested restricted shares		358		217
Equivalent shares issuable upon conversion of unvested employee stock options		160		-
Denominator for diluted income per share adjusted weighted-average shares and assumed conversions		15,524		17,020
Basic income per share:
Income from continuing operations	$	7.19	$	3.46
Income from discontinued operations	$	0.05	$	0.15
Net income	$	7.24	$	3.61
Diluted income per share:
Income from continuing operations	$	6.95	$	3.42
Income from discontinued operations	$	0.05	$	0.15
Net income	$	7.00	$	3.57