Marten Transport (MRTN) 10-K 28 Feb 25 2024 FY Annual report Financial data

Document And Entity Information

Document And Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2024	Feb. 14, 2025	Jun. 28, 2024
Document Information [Line Items]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2024
Document Transition Report	false
Entity File Number	0-15010
Entity Registrant Name	MARTEN TRANSPORT, LTD.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	39-1140809
Entity Address, Address Line One	129 Marten Street
Entity Address, City or Town	Mondovi
Entity Address, State or Province	WI
Entity Address, Postal Zip Code	54755
City Area Code	715
Local Phone Number	926-4216
Title of 12(b) Security	COMMON STOCK, PAR VALUE
Trading Symbol	MRTN
Security Exchange Name	NASDAQ
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
ICFR Auditor Attestation Flag	true
Document Financial Statement Error Correction [Flag]	false
Entity Shell Company	false
Entity Public Float			$ 1,158,326,000
Entity Common Stock, Shares Outstanding (in shares)		81,463,938
Auditor Name	GRANT THORNTON LLP
Auditor Firm ID	248
Auditor Location	Minneapolis, Minnesota
Entity Central Index Key	0000799167
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2024
Document Fiscal Period Focus	FY
Amendment Flag	false

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Current assets:
Cash and cash equivalents	$ 17,267	$ 53,213
Receivables:
Trade, less allowances of $496 and $497, respectively	89,992	105,501
Other	5,364	10,356
Prepaid expenses and other	25,888	27,512
Total current assets	138,511	196,582
Property and equipment:
Less accumulated depreciation	(370,124)	(370,103)
Net property and equipment	828,613	792,233
Other noncurrent assets	1,633	1,524
Total assets	968,757	990,339
Current liabilities:
Accounts payable	25,781	36,516
Insurance and claims accruals	44,246	47,017
Accrued and other current liabilities	23,492	26,709
Total current liabilities	93,519	110,242
Deferred income taxes	107,034	122,462
Noncurrent operating lease liabilities	282	249
Total liabilities	200,835	232,953
Commitments and Contingencies
Stockholders' equity:
Preferred stock, $.01 par value per share; 2,000,000 shares authorized; no shares issued and outstanding	0	0
Common stock, $.01 par value per share; 192,000,000 shares authorized; 81,463,938 shares at December 31, 2024, and 81,312,168 shares at December 31, 2023, issued and outstanding	815	813
Additional paid-in capital	52,941	49,789
Retained earnings	714,166	706,784
Total stockholders’ equity	767,922	757,386
Total liabilities and stockholders’ equity	968,757	990,339
Revenue Equipment [Member]
Property and equipment:
Revenue equipment	1,028,863	996,396
Land and Building [Member]
Property and equipment:
Revenue equipment	108,990	108,867
Office Equipment [Member]
Property and equipment:
Revenue equipment	$ 60,884	$ 57,073

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parentheticals) - USD ($)	Dec. 31, 2024	Dec. 31, 2023
Accounts Receivable, Allowance for Credit Loss, Current	$ 496,000	$ 497,000
Preferred Stock, Par or Stated Value Per Share (in dollars per share)	$ 0.01	$ 0.01
Preferred Stock, Shares Authorized (in shares)	2,000,000	2,000,000
Preferred Stock, Shares Issued (in shares)	0	0
Preferred Stock, Shares Outstanding, Ending Balance (in shares)	0	0
Common Stock, Par or Stated Value Per Share (in dollars per share)	$ 0.01	$ 0.01
Common Stock, Shares Authorized (in shares)	192,000,000	192,000,000
Common Stock, Shares, Outstanding (in shares)	81,463,938	81,312,168
Common Stock, Shares, Issued (in shares)	81,463,938	81,312,168

Consolidated Statements of Oper

Consolidated Statements of Operations - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Operating revenue	$ 963,708	$ 1,131,455	$ 1,263,878
Operating expenses (income):
Salaries, wages and benefits	341,732	378,818	390,304
Purchased transportation	169,142	199,334	249,792
Fuel and fuel taxes	147,143	180,437	218,571
Supplies and maintenance	63,337	67,411	55,700
Depreciation	111,653	116,722	111,014
Operating taxes and licenses	10,302	11,053	10,763
Insurance and claims	53,109	56,014	50,513
Communications and utilities	9,029	10,149	9,177
Other	30,012	35,019	38,079
Total operating expenses	930,488	1,041,345	1,120,534
Operating income	33,220	90,110	143,344
Other	(3,126)	(3,806)	(827)
Income before income taxes	36,346	93,916	144,171
Income taxes expense	9,424	23,543	33,817
Net income	$ 26,922	$ 70,373	$ 110,354
Basic earnings per common share (in dollars per share)	$ 0.33	$ 0.87	$ 1.35
Diluted earnings per common share (in dollars per share)	0.33	0.86	1.35
Dividends declared per common share (in dollars per share)	$ 0.24	$ 0.24	$ 0.24
Revenue Equipment [Member]
Operating expenses (income):
Gain on disposition of revenue equipment	$ (4,971)	$ (13,612)	$ (13,379)

Consolidated Statements of Stoc

Consolidated Statements of Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Total
Balance (in shares) at Dec. 31, 2021	83,034
Balance at Dec. 31, 2021	$ 830	$ 85,718	$ 565,129	$ 651,677
Net income	$ 0	0	110,354	110,354
Repurchase and retirement of common stock (in shares)	(2,270)
Repurchase and retirement of common stock	$ (23)	(41,730)	0	(41,753)
Issuance of common stock from share-based payment arrangement exercises and vesting of performance unit awards (in shares)	351
Issuance of common stock from share-based payment arrangement exercises and vesting of performance unit awards	$ 4	1,996	0	2,000
Employee taxes paid in exchange for shares withheld	0	(1,610)	0	(1,610)
Share-based payment arrangement compensation expense	0	2,814	0	2,814
Dividends on common stock	$ 0	0	(19,563)	(19,563)
Balance (in shares) at Dec. 31, 2022	81,115
Balance at Dec. 31, 2022	$ 811	47,188	655,920	703,919
Net income	$ 0	0	70,373	$ 70,373
Repurchase and retirement of common stock (in shares)				0
Issuance of common stock from share-based payment arrangement exercises and vesting of performance unit awards (in shares)	197
Issuance of common stock from share-based payment arrangement exercises and vesting of performance unit awards	$ 2	1,208	0	$ 1,210
Employee taxes paid in exchange for shares withheld	0	(926)	0	(926)
Share-based payment arrangement compensation expense	0	2,319	0	2,319
Dividends on common stock	$ 0	0	(19,509)	(19,509)
Balance (in shares) at Dec. 31, 2023	81,312
Balance at Dec. 31, 2023	$ 813	49,789	706,784	757,386
Net income	$ 0	0	26,922	$ 26,922
Repurchase and retirement of common stock (in shares)				0
Issuance of common stock from share-based payment arrangement exercises and vesting of performance unit awards (in shares)	152
Issuance of common stock from share-based payment arrangement exercises and vesting of performance unit awards	$ 2	1,298	0	$ 1,300
Employee taxes paid in exchange for shares withheld	0	(382)	0	(382)
Share-based payment arrangement compensation expense	0	2,236	0	2,236
Dividends on common stock	$ 0	0	(19,540)	(19,540)
Balance (in shares) at Dec. 31, 2024	81,464
Balance at Dec. 31, 2024	$ 815	$ 52,941	$ 714,166	$ 767,922

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
CASH FLOWS PROVIDED BY OPERATING ACTIVITIES:
Net income	$ 26,922	$ 70,373	$ 110,354
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	111,653	116,722	111,014
Tires in service amortization	6,888	7,172	6,604
Deferred income taxes	(15,428)	(14,579)	11,878
Share-based payment arrangement compensation expense	2,236	2,319	2,814
Changes in other current operating items:
Receivables	19,831	12,751	(23,547)
Prepaid expenses and other	(4,055)	(3,939)	(8,227)
Accounts payable	(2,439)	(3,615)	11,893
Insurance and claims accruals	(2,771)	1,270	3,733
Accrued and other current liabilities	(3,052)	(10,484)	6,352
Net cash provided by operating activities	134,814	164,378	219,489
CASH FLOW USED FOR INVESTING ACTIVITIES:
Other	(49)	(45)	(38)
Net cash used for investing activities	(152,138)	(172,540)	(134,958)
CASH FLOWS USED FOR FINANCING ACTIVITIES:
Dividends on common stock	(19,540)	(19,509)	(19,563)
Repurchase and retirement of common stock	0	0	(41,753)
Issuance of common stock from share-based payment arrangement exercises, deferred compensation plan distributions and vesting of performance unit awards	1,300	1,210	2,000
Employee taxes paid in exchange for shares withheld	(382)	(926)	(1,610)
Net cash used for financing activities	(18,622)	(19,225)	(60,926)
NET CHANGE IN CASH AND CASH EQUIVALENTS	(35,946)	(27,387)	23,605
CASH AND CASH EQUIVALENTS:
Beginning of year	53,213	80,600	56,995
End of year	17,267	53,213	80,600
SUPPLEMENTAL NON-CASH DISCLOSURE:
Change in property and equipment not yet paid	(7,626)	(1,612)	10,470
Operating lease assets and liabilities acquired	253	89	318
Income taxes	19,170	36,978	23,649
Interest	0	10	65
Revenue Equipment [Member]
Adjustments to reconcile net income to net cash provided by operating activities:
Gain on disposition of revenue equipment	(4,971)	(13,612)	(13,379)
CASH FLOW USED FOR INVESTING ACTIVITIES:
Revenue equipment additions	(227,838)	(231,943)	(162,556)
Proceeds from revenue equipment dispositions	81,057	68,009	41,695
Buildings And Land Office Equipment And Other [Member]
CASH FLOW USED FOR INVESTING ACTIVITIES:
Revenue equipment additions	(5,392)	(8,614)	(14,067)
Proceeds from revenue equipment dispositions	$ 84	$ 53	$ 8

Note 1 - Summary of Significant

Note 1 - Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2024
Notes to Financial Statements
Significant Accounting Policies [Text Block]	1. Summary of Significant Accounting Policies Nature of business: six Principles of consolidation: Cash and cash equivalents: not Trade accounts receivable: Property and equipment: Depreciation is computed based on the cost of the asset, reduced by its estimated salvage value, using the straight-line method for financial reporting purposes. We begin depreciating assets in the month that each asset is placed in service and, therefore, is ready for its intended use, and depreciate each asset until it is taken out of service and available for sale. Accelerated methods are used for income tax reporting purposes. Following is a summary of estimated useful lives for financial reporting purposes: Years Tractors 5 Trailers 7 Refrigerated containers 12 Service and other equipment 3 - 15 Buildings and improvements 20 - 40 In 2024, we replaced our company-owned tractors within an average of 3.9 years and our trailers within an average of 8.4 years after purchase. Our useful lives for depreciating tractors is five seven no five seven Long-lived assets are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable. Recoverability of assets to be held and used is measured by a comparison of the carrying amount of an asset to future net undiscounted cash flows expected to be generated by the asset. If such assets are considered to be impaired, the impairment to be recognized is measured by the amount by which the carrying amount of the assets exceeds the fair value of the assets. Assets to be disposed of are reported at the lower of the carrying amount or fair value less the costs to sell. Tires in service: Income taxes: In the ordinary course of business there is inherent uncertainty in quantifying our income tax positions. We assess our income tax positions and record tax benefits for all years subject to examination based upon management’s evaluation of the facts, circumstances and information available at the reporting dates. For those tax positions where it is more-likely-than-not that a tax benefit will be sustained, we have recorded the largest amount of tax benefit with a greater than 50% likelihood of being realized upon ultimate settlement with a taxing authority that has full knowledge of all relevant information. For those income tax positions where it is not more-likely-than-not that a tax benefit will be sustained, no tax benefit has been recognized in the financial statements. Potential accrued interest and penalties related to unrecognized tax benefits are recognized as a component of income tax expense. Insurance and claims: Revenue recognition: Revenue from Contracts with Customers We account for revenue of our Intermodal and Brokerage segments and revenue on freight transported by independent contractors within our Truckload and Dedicated segments on a gross basis because we are the principal service provider controlling the promised service before it is transferred to each customer. We are primarily responsible for fulfilling the promise to provide each specified service to each customer. We bear the primary risk of loss in the event of cargo claims by our customers. We also have complete control and discretion in establishing the price for each specified service. Accordingly, all such revenue billed to customers is classified as operating revenue and all corresponding payments to carriers for transportation services we arrange in connection with brokerage and intermodal activities and to independent contractor providers of revenue equipment are classified as purchased transportation expense within our consolidated statements of operations. See Note 14 for more information. Our largest customer, Walmart, accounted for 20% of our revenue excluding fuel surcharges in 2024 and 21% of our trade receivables as of December 31, 2024, 19% of our revenue in 2023 and 19% of our trade receivables as of December 31, 2023, and 21% of our revenue in 2022. During each of 2024, 2023 and 2022, approximately 99% of our revenue was generated within the United States. Share-based payment arrangement compensation: Compensation-Stock Compensation Earnings per common share: Segment reporting: Segment Reporting six four Use of estimates: Adoption of new accounting standard:

Note 2 - Details of Consolidate

Note 2 - Details of Consolidated Balance Sheet Accounts	12 Months Ended
	Dec. 31, 2024
Notes to Financial Statements
Supplemental Balance Sheet Disclosures [Text Block]	2. Details of Consolidated Balance Sheet Accounts Prepaid expenses and other: (In thousands) 2024 2023 License fees $ 5,863 $ 5,557 Parts and tires inventory 5,694 6,286 Insurance premiums 5,324 4,608 Tires in service 4,582 4,984 Contract assets 1,584 2,106 Other 2,841 3,971 $ 25,888 $ 27,512 Accrued and other current liabilities: (In thousands) 2024 2023 Accrued expenses $ 10,243 $ 10,575 Vacation 8,377 9,612 Salaries and wages 1,429 3,800 Accrued income taxes 1,065 - Other 2,378 2,722 $ 23,492 $ 26,709

Note 3 - Long-term Debt

Note 3 - Long-term Debt	12 Months Ended
	Dec. 31, 2024
Notes to Financial Statements
Debt Disclosure [Text Block]	3. Long-Term Debt In August 2022, we entered into a credit agreement that provides for an unsecured committed credit facility with an aggregate principal amount of $30.0 million which matures in August 2027. The credit agreement amends, restates and continues in its entirety our previous credit agreement, as amended. At December 31, 2024, there was no outstanding principal balance on the facility. As of that date, we had outstanding standby letters of credit to guarantee settlement of self-insurance claims of $23.1 million and remaining borrowing availability of $6.9 million. At December 31, 2023, there was also no outstanding principal balance on the facility. As of that date, we had outstanding standby letters of credit of $20.7 million on the facility. This facility bears interest at a variable rate based on the Term SOFR Rate plus applicable margins. The interest rate for the facility that would apply to outstanding principal balances was 7.5% at December 31, 2024. Our credit agreement effective in August 2022 prohibits us from paying, in any fiscal year, stock redemptions and dividends in excess of $150 million. Our previous credit agreement prohibited us from making such payments in excess of 25% of our net income from the prior fiscal year. A waiver allowing stock redemptions and dividends in excess of the 25% limitation in total amounts of up to $80 million in 2022 was obtained from the lender in March 2022. The current and previous credit agreements also contain restrictive covenants which, among other matters, require us to maintain compliance with cash flow leverage and fixed charge coverage ratios. We were in compliance with all covenants at December 31, 2024 and December 31, 2023.

Note 4 - Related Party Transact

Note 4 - Related Party Transactions	12 Months Ended
	Dec. 31, 2024
Notes to Financial Statements
Related Party Transactions Disclosure [Text Block]	4. Related Party Transactions The following related party transactions occurred during the three years ended December 31, 2024: (a) We purchase tires and obtain related services from a company in which one of our directors is the chairman of the board and chief executive officer. We paid that company $27,000 in 2024, $195,000 in 2023 and $477,000 in 2022 for tires and related services. In addition, we paid $2.2 million in 2024 and $2.0 million in each of 2023 and 2022 to tire manufacturers for tires that were provided by the same company. The same company received commissions from the tire manufacturers related to these purchases. We did not (b) We paid $8,000 in each of 2024 and 2023 and $10,000 in 2022 for building repairs to a company in which one of our directors is the chief executive officer and the principal stockholder. We did not

Note 5 - Income Taxes

Note 5 - Income Taxes	12 Months Ended
	Dec. 31, 2024
Notes to Financial Statements
Income Tax Disclosure [Text Block]	5. Income Taxes The components of the income taxes expense consisted of the following: (In thousands) 2024 2023 2022 Current: Federal $ 21,254 $ 33,416 $ 18,025 State 3,598 4,706 3,914 Total current 24,852 38,122 21,939 Deferred: Federal (12,748 ) (13,526 ) 9,795 State (2,680 ) (1,053 ) 2,083 Total deferred (15,428 ) (14,579 ) 11,878 Total expense $ 9,424 $ 23,543 $ 33,817 The federal statutory income tax rate is reconciled to the effective income tax rate as follows: 2024 2023 2022 Federal statutory income tax rate 21 % 21 % 21 % Increase in taxes arising from state income taxes, net of federal income tax benefit 2 3 3 Per diem and other non-deductible expenses 4 2 - Federal tax credits (1 ) - - Other, net - (1 ) (1 ) Effective tax rate 26 % 25 % 23 % As of December 31, the net deferred tax liability consisted of the following: (In thousands) 2024 2023 Deferred tax assets: Reserves and accrued liabilities $ 12,347 $ 13,126 Other 1,454 1,212 13,801 14,338 Deferred tax liabilities: Depreciation 117,595 133,634 Prepaid expenses 3,240 3,166 120,835 136,800 Net deferred tax liability $ 107,034 $ 122,462 We have not provided a valuation allowance against deferred tax assets at December 31, 2024 or 2023. We believe the deferred tax assets will be realized principally through future reversals of existing taxable temporary differences (deferred tax liabilities) and future taxable income. Our reserves for unrecognized tax benefits were $386,000 as of December 31, 2024 and $434,000 as of December 31, 2023. The $48,000 decrease in the amount reserved relates to current period tax positions. If recognized, $305,000 of the unrecognized tax benefits as of December 31, 2024 would favorably impact our effective tax rate. Potential interest and penalties related to unrecognized tax benefits of $14,000 were recognized in our financial statements as of each of December 31, 2024 and 2023. The federal statute of limitations remains open for 2021 and forward. We file tax returns in numerous state jurisdictions with varying statutes of limitations.

Note 6 - Earnings Per Common Sh

Note 6 - Earnings Per Common Share	12 Months Ended
	Dec. 31, 2024
Notes to Financial Statements
Earnings Per Share [Text Block]	6. Earnings per Common Share Basic and diluted earnings per common share were computed as follows: (In thousands, except per share amounts) 2024 2023 2022 Numerator: Net income $ 26,922 $ 70,373 $ 110,354 Denominator: Basic earnings per common share - weighted-average shares 81,406 81,272 81,692 Effect of dilutive stock options 66 141 267 Diluted earnings per common share - weighted-average shares and assumed conversions 81,472 81,413 81,959 Basic earnings per common share $ 0.33 $ 0.87 $ 1.35 Diluted earnings per common share $ 0.33 $ 0.86 $ 1.35 Options totaling 504,500, 173,300 and 541,500 equivalent shares were outstanding but were not included in the calculation of diluted earnings per share for 2024, 2023 and 2022, respectively, because including the options in the denominator would be antidilutive, or decrease the number of weighted-average shares, due to their exercise prices exceeding the average market price of the common shares, or because inclusion of average unrecognized compensation expense in the calculation would cause the options to be antidilutive. Unvested performance unit awards (see Note 10) totaling 112,250, 106,582 and 16,632 equivalent shares for 2024, 2023 and 2022, respectively, were considered outstanding but were not included in the calculation of diluted earnings per share because inclusion of average unrecognized compensation expense in the calculation would cause the performance units to be antidilutive.

Note 7 - Share Repurchase Progr

Note 7 - Share Repurchase Program	12 Months Ended
	Dec. 31, 2024
Notes to Financial Statements
Treasury Stock [Text Block]	7. Share Repurchase Program In August 2019, our Board of Directors approved and we announced an increase from current availability in our existing share repurchase program providing for the repurchase of up to $34.0 million, or approximately 1.8 million shares, of our common stock, which was increased by our Board of Directors to 2.7 million shares in August 2020 to reflect the three two We repurchased and retired 1.3 million shares of common stock for $25.0 million in the first quarter of 2022, and 963,000 shares of common stock for $16.8 million in the second quarter of 2022. We did not

Note 8 - Dividends

Note 8 - Dividends	12 Months Ended
	Dec. 31, 2024
Notes to Financial Statements
Dividends [Text Block]	8. Dividends In 2010, we announced a regular cash dividend program to our stockholders, subject to approval each quarter. Quarterly cash dividends of $0.06 per share of common stock were paid in each quarter of 2024 and 2023 which totaled $19.5 million in each year, and in each quarter of 2022 which totaled $19.6 million.

Note 9 - Leases

Note 9 - Leases	12 Months Ended
	Dec. 31, 2024
Notes to Financial Statements
Lessee, Operating Leases [Text Block]	9. Leases We lease facilities, drop yards, office space, land, chassis and equipment. All leases are classified as operating leases. We do not have any financing leases. Payments for operating leases that extend beyond 12 months are fixed. Some leases include options to renew, with renewal terms that can extend the lease term from six five Management has elected to apply the short-term lease exemption to leases with an initial term of 12 months or less and these leases are not capitalized. This primarily affects drop yards and chassis, for which we recognize lease expense on a straight-line basis over the lease term. As of December 31, the classification of operating leases in our consolidated balance sheets was as follows: (In thousands) 2024 2023 Assets: Other noncurrent assets $ 578 $ 517 Liabilities: Accrued and other current liabilities 296 268 Noncurrent operating lease liabilities 282 249 Total liabilities $ 578 $ 517 (a) Operating lease asset balances at December 31, 2024 and 2023. The maturity of the operating lease liabilities is as follows: Amount Maturities: 2025 $ 318 2026 233 2027 65 2028 11 Total lease payments 627 Adjust to present value (49 ) Total operating lease liabilities $ 578 The weighted-average remaining lease term at December 31, 2024 was 27 months and at December 31, 2023 was 33 months. The weighted-average discount rate was 6.5% at December 31, 2024 and 5.1% at December 31, 2023. The operating leases identified do not specify implicit rates, accordingly, we use our incremental borrowing rate at the time of lease inception to determine the present value of lease payments. Operating lease assets obtained in exchange for lease obligations in 2024 and 2023 totaled $253,000 and $89,000, respectively. We paid $307,000 of cash for capitalized operating leases during 2024 and $332,000 during 2023. Total operating lease expense for 2024 was $5.2 million and for 2023 was $6.5 million. These amounts are reported within other operating expenses in our consolidated statements of operations and include $4.9 million and $6.2 million, respectively, of short-term lease expense with an initial term of 12 months or less.

Note 10 - Employee Benefits

Note 10 - Employee Benefits	12 Months Ended
	Dec. 31, 2024
Notes to Financial Statements
Compensation and Employee Benefit Plans [Text Block]	10. Employee Benefits Equity Incentive Plans five At our 2019 Annual Meeting of Stockholders held on May 7, 2019, our stockholders approved an amendment to the Marten Transport, Ltd. 2015 Equity Incentive Plan, which was previously approved and adopted by our Board of Directors, subject to approval by our stockholders. The amendment increased the number of shares of common stock authorized for issuance under the 2015 Plan by 1.3 million shares and the number of shares of common stock authorized for issuance pursuant to full-value awards by 558,334 shares. The amendment also adjusted certain numbers to reflect the stock split that occurred in July 2017. On August 13, 2020, we effected a three two As of December 31, 2024, there were 704,421 shares reserved for issuance under options outstanding and 298,791 shares reserved for issuance under outstanding performance unit awards under the 2015 Plan. The 2015 Plan replaced our 2005 Stock Incentive Plan (the “2005 Plan”), which expired by its terms in May 2015. Under the 2005 Plan, officers, directors and employees were granted non-statutory stock options and performance unit awards with similar terms to the options and awards under the 2015 Plan. As of December 31, 2024 and 2023, there were no remaining shares reserved for issuance under options issued within the 2005 Plan. As of the same dates, there were also no remaining shares reserved for issuance under performance unit awards issued within the 2005 Plan. No additional awards will be granted under the 2005 Plan. We use the Black-Scholes option pricing model to calculate the grant-date fair value of option awards. The fair value of service-based option awards granted was estimated as of the date of grant using the following weighted average assumptions: 2024 2023 2022 Expected option life in years (1) 6.0 6.0 6.0 Expected stock price volatility percentage (2) 27 % 28 % 26 % Risk-free interest rate percentage (3) 4.3 % 4.1 % 2.9 % Expected dividend yield (4) 1.38 % 1.14 % 1.13 % Fair value as of the date of grant $ 5.26 $ 6.63 $ 5.79 (1) Expected option life – We use historical employee exercise and option expiration data to estimate the expected life assumption for the Black-Scholes grant-date valuation. We believe that this historical data is currently the best estimate of the expected term of a new option. We use a weighted-average expected life for all awards. (2) Expected stock price volatility – We use our stock’s historical volatility for the same period of time as the expected life. We have no reason to believe that its future volatility will differ from the past. (3) Risk-free interest rate – The rate is based on the U.S. Treasury yield curve in effect at the time of the grant for the same period of time as the expected life. (4) Expected dividend yield – The calculation is based on the total expected annual dividend payout divided by the average stock price. Compensation costs associated with service-based option awards with graded vesting are recognized, net of an estimated forfeiture rate, on a straight-line basis over the requisite service period, which is the period between the grant date and the award’s stated vesting term. Service-based option awards become immediately exercisable in full in the event of death or disability and upon a change in control with respect to all options that have been outstanding for at least six months. In May 2018, we granted 68,550 performance unit awards under our 2015 Equity Incentive Plan to certain employees. This was our ninth grant of such awards. As of December 31, 2018 and each December 31 st In May 2019, we granted 60,000 performance unit awards under our 2015 Equity Incentive Plan with similar terms to the awards granted in 2018. We also granted 45,000 performance unit awards in May 2019 with similar terms to such awards, except that all vested performance units were paid to the employees immediately upon vesting. These awards granted in 2019 vested from December 31, 2019 through 2023. In May 2020, we granted 73,205 performance unit awards under our 2015 Equity Incentive Plan with similar terms to awards granted in 2018, except that all vested performance units were paid to the employees immediately upon vesting. These awards granted in 2020 vested from December 31, 2020 through 2024. In May 2021, we granted 98,400 performance unit awards under our 2015 Equity Incentive Plan with similar terms to awards granted in 2020. These awards granted in 2021 vest from December 31, 2021 through 2025. In May 2022, we granted 102,900 performance unit awards, and in August 2022, we granted 21,000 performance unit awards, under our 2015 Equity Incentive Plan with similar terms to awards granted in 2020. These awards granted in 2022 vest from December 31, 2022 through 2026. In May 2023, we granted 114,044 performance unit awards under our 2015 Equity Incentive Plan with similar terms to awards granted in 2020. These awards granted in 2023 vest from December 31, 2023 through 2027. In May 2024, we granted 125,464 performance unit awards under our 2015 Equity Incentive Plan with similar terms to awards granted in 2020. These awards granted in 2024 vest from December 31, 2024 through 2028. In May 2020, our Compensation Committee and Board of Directors approved the termination of our deferred compensation plan. The termination was effective in May 2021. All shares of our common stock within the plan were distributed by March 2022. The fair value of each performance unit is based on the closing market price on the date of grant. We recognize compensation expense for these awards based on the estimated number of units probable of achieving the vesting requirements of the awards, net of an estimated forfeiture rate. The amount of share-based compensation recognized during a period is based on the value of the portion of the awards that are ultimately expected to vest. Forfeitures are estimated at the time of grant and revised, if necessary, in subsequent periods if actual forfeitures differ from those estimates. We currently expect, based on an analysis of our historical forfeitures and known forfeitures on existing awards, that approximately 1.25% of unvested outstanding awards will be forfeited each year. This analysis will be re-evaluated on a quarterly basis and the forfeiture rate will be adjusted as necessary. Ultimately, the actual expense recognized over the vesting period will only be for those shares that vest. Total share-based compensation expense recorded in 2024 was $2.2 million ($1.7 million net of income tax benefit, $0.02 earnings per basic and diluted share), in 2023 was $2.3 million ($1.7 million net of income tax benefit, $0.02 earnings per basic and diluted share) and in 2022 was $2.8 million ($2.2 million net of income tax benefit, $0.03 earnings per basic and diluted share). All share-based compensation expense was recorded in salaries, wages and benefits expense. As of December 31, 2024, there was a total of $1.2 million of unrecognized compensation expense related to unvested service-based option awards, which is expected to be recognized over a weighted-average period of 2.4 years, and $4.8 million of unrecognized compensation expense related to unvested performance unit awards, which will be recorded based on the estimated number of units probable of achieving the vesting requirements of the awards through 2028. Option activity in 2024 was as follows: Shares Weighted- Average Exercise Price Outstanding at December 31, 2023 838,150 $ 16.65 Granted 28,000 17.77 Exercised (99,829 ) 13.05 Forfeited (61,900 ) 17.26 Outstanding at December 31, 2024 704,421 $ 17.17 Exercisable at December 31, 2024 441,921 $ 16.23 The 704,421 options outstanding as of December 31, 2024 have a weighted-average remaining contractual life of 3.3 years and an aggregate intrinsic value based on our closing stock price on December 31, 2024 for in-the-money options of $339,000. The 441,921 options exercisable as of the same date have a weighted-average remaining contractual life of 2.7 years and an aggregate intrinsic value, similarly calculated, of $332,000. The fair value of options granted in 2024, 2023 and 2022 was $147,000, $258,000 and $819,000, respectively, for service-based options. The total intrinsic value of options exercised in 2024, 2023 and 2022 was $521,000, $1.1 million and $2.0 million, respectively. Intrinsic value is the difference between the fair value of the acquired shares at the date of exercise and the exercise price, multiplied by the number of options exercised. Proceeds received from option exercises in 2024, 2023 and 2022 were $1.8 million, $2.4 million and $4.0 million, respectively. Nonvested service-based option awards as of December 31, 2024 and changes during 2024 were as follows: Shares Weighted- Average Grant Date Fair Value Weighted- Average Remaining Contractual Life (in Years) Nonvested at December 31, 2023 406,300 $ 4.88 5.0 Granted 28,000 5.26 6.6 Vested (128,300 ) 4.67 3.6 Forfeited (43,500 ) 4.57 4.2 Nonvested at December 31, 2024 262,500 $ 5.07 4.4 The total fair value of options which vested during 2024, 2023 and 2022 was $599,000, $744,000 and $691,000, respectively. The following table summarizes our nonvested performance unit award activity in 2024: Shares Weighted-Average Grant Date Fair Value Nonvested at December 31, 2023 188,400 $ 19.51 Granted 125,464 17.54 Vested (49,162 ) (1) 18.34 Forfeited (9,148 ) 20.26 Nonvested at December 31, 2024 255,554 $ 18.77 (1) This number of performance unit award shares vested based on our financial performance in 2024 and will be distributed in March 2025. The fair value of unit award shares that vested in 2024 was $901,000. Retirement Savings Plan No Stock Purchase Plans

Note 11- Termination of Deferre

Note 11- Termination of Deferred Compensation Plan	12 Months Ended
	Dec. 31, 2024
Notes to Financial Statements
Compensation Related Costs, General [Text Block]	11. Termination of Deferred Compensation Plan In August 2010, our Board of Directors approved and adopted the Marten Transport, Ltd. Deferred Compensation Plan. The deferred compensation plan was an unfunded, nonqualified deferred compensation plan designed to allow board elected officers and other select members of our management designated by our Compensation Committee to save for retirement on a tax-deferred basis. Under the terms of the plan, each participant was eligible to defer portions of their base pay, annual bonus or receipt of common stock otherwise payable under a vested performance unit award. Each participant could have elected a fixed distribution date for the participant’s deferral account, other than certain required performance unit award deferrals credited to the discretionary account, which were to be distributed after the later of the date of the participant’s termination of employment or the date the participant attains age 62. Upon termination of a participant’s employment with us, the plan required a lump-sum distribution of the deferral account, excluding the required performance unit award deferrals, unless the participant had elected an installment distribution. Upon a participant’s death, the plan provided that a participant’s distributions accelerate and be paid in a lump sum to the participant’s beneficiary. We had the ability to terminate the plan and accelerate distributions to participants, but only to the extent and at the times permitted under Section 409A of the Internal Revenue Code of 1986, as amended. We had the ability to terminate the plan and accelerate distributions upon a change in control, which was not a payment event under the plan. In conjunction with the approval of the plan, our Board of Directors also adopted an amendment to the Marten Transport, Ltd. 2005 Stock Incentive Plan to allow for deferral of receipt of income from a performance unit award under the plan. Such deferral is also provided for within the Marten Transport, Ltd. 2015 Equity Incentive Plan. In May 2020, our Compensation Committee and Board of Directors approved the termination of our deferred compensation plan. The termination was effective in May 2021. All shares of our common stock within the plan were distributed by March 2022.

Note 12 - Fair Value of Financi

Note 12 - Fair Value of Financial Instruments	12 Months Ended
	Dec. 31, 2024
Notes to Financial Statements
Fair Value Disclosures [Text Block]	12. Fair Value of Financial Instruments The carrying amounts of cash equivalents, accounts receivable and accounts payable approximate fair value because of the short maturity of these instruments.

Note 13 - Commitments and Conti

Note 13 - Commitments and Contingencies	12 Months Ended
	Dec. 31, 2024
Notes to Financial Statements
Commitments and Contingencies Disclosure [Text Block]	13. Commitments and Contingencies We are committed to new revenue equipment purchases of $191.2 million in 2025. Operating lease obligation expenditures through 2028 total $627,000. We self-insure, in part, for losses relating to workers’ compensation, auto liability, general liability, cargo and property damage claims, along with employees’ health insurance, with varying risk retention levels. We maintain insurance coverage for per-incident and total losses in excess of these risk retention levels in amounts we consider adequate based upon historical experience and our ongoing review, and reserve currently for the estimated cost of the uninsured portion of pending claims. We are also involved in other legal actions that arise in the ordinary course of business. A number of trucking companies, including us, have been subject to lawsuits alleging violations of various federal and state wage and hour laws. A number of these lawsuits have resulted in the payment of substantial settlements or damages by the defendants. The outcome of all litigation is difficult to assess or quantify, and the magnitude of the potential loss relating to such lawsuits may remain unknown for substantial periods of time. The cost to defend litigation may also be significant. Not all claims are covered by our insurance, and there can be no assurance that our coverage limits will be adequate to cover all amounts in dispute. To the extent we experience claims that are uninsured, exceed our coverage limits or cause increases in future premiums, the resulting expense could have a materially adverse effect on our business and operating results. Based on our present knowledge of the facts and, in certain cases, advice of outside counsel, management believes the resolution of open claims and pending litigation, taking into account existing reserves, is not likely to have a materially adverse effect on our consolidated financial statements, however, any future liability claims or adverse developments in existing claims could impact this analysis.

Note 14 - Revenue and Business

Note 14 - Revenue and Business Segments	12 Months Ended
	Dec. 31, 2024
Notes to Financial Statements
Segment Reporting Disclosure [Text Block]	14. Revenue and Business Segments We account for our revenue in accordance with FASB ASC 606, Revenue from Contracts with Customers six four We have strategically transitioned from a refrigerated long-haul carrier to a multifaceted business offering a network of time and temperature-sensitive and dry truck-based transportation and distribution capabilities across our six distinct business platforms – Temperature-Sensitive and Dry Truckload, Dedicated, Intermodal, Brokerage and MRTN de Mexico. Our Truckload segment provides a combination of regional short-haul and medium-to-long-haul full-load transportation services. We transport food and other consumer packaged goods that require a temperature-controlled or insulated environment, along with dry freight, across the United States and into and out of Mexico and Canada. Our agreements with customers are typically for one year. Our Dedicated segment provides customized transportation solutions tailored to meet individual customers’ requirements, utilizing temperature-controlled trailers, dry vans and other specialized equipment within the United States. Our agreements with customers range from three five Generally, we are paid by the mile for our Truckload and Dedicated services. We also derive Truckload and Dedicated revenue from fuel surcharges, loading and unloading activities, equipment detention and other accessorial services. The main factors that affect our Truckload and Dedicated revenue are the rate per mile we receive from our customers, the percentage of miles for which we are compensated, the number of miles we generate with our equipment and changes in fuel prices. We monitor our revenue production primarily through average Truckload and Dedicated revenue, net of fuel surcharges, per tractor per week. We also analyze our average Truckload and Dedicated revenue, net of fuel surcharges, per total mile, non-revenue miles percentage, the miles per tractor we generate, our fuel surcharge revenue, our accessorial revenue and our other sources of operating revenue. Our Intermodal segment transports our customers’ freight within the United States utilizing our refrigerated containers on railroad flatcars for portions of trips, with the balance of the trips using our tractors or, to a lesser extent, contracted carriers. The main factors that affect our Intermodal revenue are the rate per mile and other charges we receive from our customers. Our Brokerage segment develops contractual relationships with and arranges for third-party carriers to transport freight for our customers in temperature-controlled trailers and dry vans within the United States and into and out of Mexico through Marten Transport Logistics, LLC, which was established in 2007 and operates pursuant to brokerage authority granted by the United States Department of Transportation, or DOT. We retain the billing, collection and customer management responsibilities. The main factors that affect our Brokerage revenue are the rate per mile and other charges that we receive from our customers. Operating results of our MRTN de Mexico business which offers our customers door-to-door service between the United States and Mexico with our Mexican partner carriers is reported within our Truckload and Brokerage segments. Our customer agreements are typically for one-year no The following table sets forth for the years indicated our operating revenue and operating income by segment. (In thousands) 2024 2023 2022 Operating revenue: Truckload revenue, net of fuel surcharge revenue $ 377,452 $ 395,565 $ 411,448 Truckload fuel surcharge revenue 62,340 69,910 89,014 Total Truckload revenue 439,792 465,475 500,462 Dedicated revenue, net of fuel surcharge revenue 267,077 334,962 336,973 Dedicated fuel surcharge revenue 52,058 73,310 92,119 Total Dedicated revenue 319,135 408,272 429,092 Intermodal revenue, net of fuel surcharge revenue 49,468 75,887 100,452 Intermodal fuel surcharge revenue 9,286 16,191 29,313 Total Intermodal revenue 58,754 92,078 129,765 Brokerage revenue 146,027 165,630 204,559 Total operating revenue $ 963,708 $ 1,131,455 $ 1,263,878 Operating income/(loss): Truckload $ 3,283 $ 24,835 $ 59,392 Dedicated 23,037 48,377 50,566 Intermodal (3,922 ) (156 ) 10,639 Brokerage 10,822 17,054 22,747 Total operating income $ 33,220 $ 90,110 $ 143,344 The following segment operating results for the years indicated are provided monthly to our chief operating decision maker, our chief executive officer, and used in assessing segment performance and allocating resources, primarily based upon each segment’s variances in operating revenue, operating income and operating ratio. We do not prepare separate balance sheets by segment and, as a result, assets are not separately identifiable by segment. 2024 Segment Operating Results (In thousands) Truckload Dedicated Intermodal Brokerage Total Operating revenue $ 439,792 $ 319,135 $ 58,754 $ 146,027 $ 963,708 Operating expense (income): Salaries, wages and benefits 185,871 137,340 11,028 7,493 341,732 Purchased transportation 4,520 10,568 31,612 122,442 169,142 Fuel and fuel taxes 88,868 52,925 5,350 - 147,143 Supplies and maintenance 39,925 20,141 3,285 (14 ) 63,337 Depreciation 64,074 39,452 6,076 2,051 111,653 Operating taxes and licenses 5,577 4,066 330 329 10,302 Insurance and claims 29,693 21,025 1,617 774 53,109 Communications and utilities 5,121 2,861 223 824 9,029 Gain on disposition of revenue equipment (2,683 ) (2,111 ) (177 ) - (4,971 ) Other 15,543 9,831 3,332 1,306 30,012 Total operating expenses 436,509 296,098 62,676 135,205 930,488 Operating income/(loss) $ 3,283 $ 23,037 $ (3,922 ) $ 10,822 $ 33,220 Operating ratio 99.3 % 92.8 % 106.7 % 92.6 % 96.6 % Operating ratio, net of fuel surcharges 99.1 % 91.4 % 107.9 % 92.6 % 96.0 % 2023 Segment Operating Results (In thousands) Truckload Dedicated Intermodal Brokerage Total Operating revenue $ 465,475 $ 408,272 $ 92,078 $ 165,630 $ 1,131,455 Operating expense (income): Salaries, wages and benefits 189,010 165,257 17,666 6,885 378,818 Purchased transportation 4,958 10,778 47,531 136,067 199,334 Fuel and fuel taxes 98,852 73,083 8,502 - 180,437 Supplies and maintenance 37,495 26,061 3,826 29 67,411 Depreciation 61,644 46,151 7,071 1,856 116,722 Operating taxes and licenses 5,483 4,881 470 219 11,053 Insurance and claims 28,460 24,503 2,341 710 56,014 Communications and utilities 5,064 3,727 359 999 10,149 Gain on disposition of revenue equipment (6,694 ) (6,304 ) (614 ) - (13,612 ) Other 16,368 11,758 5,082 1,811 35,019 Total operating expenses 440,640 359,895 92,234 148,576 1,041,345 Operating income/(loss) $ 24,835 $ 48,377 $ (156 ) $ 17,054 $ 90,110 Operating ratio 94.7 % 88.2 % 100.2 % 89.7 % 92.0 % Operating ratio, net of fuel surcharges 93.7 % 85.6 % 100.2 % 89.7 % 90.7 % 2022 Segment Operating Results (In thousands) Truckload Dedicated Intermodal Brokerage Total Operating revenue $ 500,462 $ 429,092 $ 129,765 $ 204,559 $ 1,263,878 Operating expense (income): Salaries, wages and benefits 188,131 172,179 21,602 8,392 390,304 Purchased transportation 4,835 9,559 65,271 170,127 249,792 Fuel and fuel taxes 114,306 91,091 13,174 - 218,571 Supplies and maintenance 30,495 21,268 4,028 (91 ) 55,700 Depreciation 56,365 45,630 7,493 1,526 111,014 Operating taxes and licenses 5,037 4,855 516 355 10,763 Insurance and claims 25,848 21,723 2,268 674 50,513 Communications and utilities 4,548 3,471 412 746 9,177 Gain on disposition of revenue equipment (6,308 ) (6,386 ) (685 ) - (13,379 ) Other 17,813 15,136 5,047 83 38,079 Total operating expenses 441,070 378,526 119,126 181,812 1,120,534 Operating income $ 59,392 $ 50,566 $ 10,639 $ 22,747 $ 143,344 Operating ratio 88.1 % 88.2 % 91.8 % 88.9 % 88.7 % Operating ratio, net of fuel surcharges 85.6 % 85.0 % 89.4 % 88.9 % 86.4 %

Insider Trading Arrangements

Insider Trading Arrangements	12 Months Ended
	Dec. 31, 2024
Insider Trading Arr Line Items
Material Terms of Trading Arrangement [Text Block]	ITEM 9B. OTHER INFORMATION During 2024, none
Rule 10b5-1 Arrangement Adopted [Flag]	false
Rule 10b5-1 Arrangement Terminated [Flag]	false
Non-Rule 10b5-1 Arrangement Adopted [Flag]	false
Non-Rule 10b5-1 Arrangement Terminated [Flag]	false

Cybersecurity Risk Management a

Cybersecurity Risk Management and Strategy Disclosure	12 Months Ended
	Dec. 31, 2024
Cybersecurity Risk Management, Strategy, and Governance [Line Items]
Cybersecurity Risk Management Processes for Assessing, Identifying, and Managing Threats [Text Block]	We have processes in place for assessing, identifying and managing material risks from cybersecurity threats. In order to assess and identify material risks from cybersecurity threats, we engage a third-party managed security service provider to conduct ongoing (24x7x365) security information and event management (SIEM) monitoring to collect, aggregate and analyze data from our applications, devices, servers and users in real-time to assist our security team in detecting and blocking cybersecurity attacks. In addition, we conduct periodic security vulnerability scans as well as external and internal penetration testing that simulate attacks on our computer systems to assist with the discovery and remediation of security flaws and vulnerabilities. Management continually reassesses our cybersecurity risk environment based on changing circumstances and new information identified by our monitoring, scanning and testing, as well as third party resources. Our processes for assessing, identifying and managing cybersecurity threats have been integrated into our overall risk management processes. The information provided by these processes facilitates management’s ongoing assessment of our cybersecurity risk environment and provides current and accurate information regarding cybersecurity risks to management, our Audit Committee and Board to allow appropriate management of such risks through remediation or other risk mitigation activities. We engage various third-party cybersecurity service providers to assist with protection and monitoring of our systems and information, including with respect to protection of our e-mail and system access. These service providers are subject to an initial risk assessment as well as periodic risk assessments in order to evaluate, identify and mitigate risks from cybersecurity threats arising from our use of such service providers. Although we have taken steps to prevent and mitigate service interruptions and data security threats, the operational and security risks associated with information technology systems have increased in recent years because of the complexity of the systems and the sophistication and increasing volume of cyberattacks. We have been subject to cyberattacks, which have yet to have a material impact on our business or results of operations, but this might not always be the case in the future. For example, as previously reported, in October 2021, we detected a cyberattack that accessed and encrypted files utilized by us in the operation of our business. The incident did not have a material impact on our business, operations or financial results. Nonetheless, certain employee data was at risk during the event. Our business could be materially and adversely affected if our management information and communication systems are materially compromised or disrupted by a failure or security breach, or if we are unable to safely improve, upgrade, integrate or expand our systems as we continue to execute our growth strategy. In addition, there has also been heightened regulatory focus on data protection, and failure to comply with applicable data protection regulations or other data protection standards may expose us to litigation, fines, sanctions or other penalties, which could harm our reputation and adversely impact our business, results of operations and financial condition. Management is responsible for our day-to-day cybersecurity risk management and the Board’s responsibility is to engage in informed oversight of and provide overall direction with respect to such risk management. As part of its charter, the Audit Committee discusses with management and the independent auditors our adequacy and effectiveness of accounting and financial controls, including our systems to monitor and manage business, information technology and cybersecurity risks. On an annual basis, management prepares and presents to the Audit Committee a risk management summary that identifies risks by operational department (e.g., executive, finance, human resources, information systems, maintenance, operations, sales and marketing, risk management and safety), estimated maximum exposure per occurrence, the risk management option and insured level. The Board, its committees and management continually re-assess our cybersecurity risk environment based on changing circumstances and new information. The Audit Committee regularly discusses with management its enterprise risk management process, including our cybersecurity exposures, the steps management has taken to monitor and control such exposures and guidelines and policies to govern our risk assessment and risk management processes. The Audit Committee periodically reports to the Board regarding significant matters identified with respect to the foregoing, including, among others, our risk assessment and risk management approach to cybersecurity. Our Executive Vice President and Chief Technology Officer, Randall Baier, is responsible for our day-to-day assessment and management of cybersecurity risks. Mr. Baier also served as our Senior Vice President of Information Systems from December 2019 to August 2023, our Vice President of Information Systems from January 2014 to December 2019 and our Senior Director of Information Systems from April 2011 to January 2014. Mr. Baier advanced through various professional capacities in our information technology area including Developer, System Administrator and Database Administrator from April 1993 to April 2011. We have implemented a number of processes which allow Mr. Baier and his team to be informed about and monitor the prevention, detection, mitigation and remediation of cybersecurity incidents. These processes include, among other things, system alerts of potential malicious cyber activity, access to real-time dashboards that monitor and assess our systems, status reports provided on a daily, weekly and monthly basis and regular ongoing communications with service providers regarding potential new attack vectors and vulnerabilities. Mr. Baier shares such information with our management team and reports information about such risks to the Audit Committee.
Cybersecurity Risk Management Processes Integrated [Flag]	true
Cybersecurity Risk Management Processes Integrated [Text Block]	We have processes in place for assessing, identifying and managing material risks from cybersecurity threats. In order to assess and identify material risks from cybersecurity threats, we engage a third-party managed security service provider to conduct ongoing (24x7x365) security information and event management (SIEM) monitoring to collect, aggregate and analyze data from our applications, devices, servers and users in real-time to assist our security team in detecting and blocking cybersecurity attacks. In addition, we conduct periodic security vulnerability scans as well as external and internal penetration testing that simulate attacks on our computer systems to assist with the discovery and remediation of security flaws and vulnerabilities. Management continually reassesses our cybersecurity risk environment based on changing circumstances and new information identified by our monitoring, scanning and testing, as well as third party resources. Our processes for assessing, identifying and managing cybersecurity threats have been integrated into our overall risk management processes. The information provided by these processes facilitates management’s ongoing assessment of our cybersecurity risk environment and provides current and accurate information regarding cybersecurity risks to management, our Audit Committee and Board to allow appropriate management of such risks through remediation or other risk mitigation activities.
Cybersecurity Risk Management Third Party Engaged [Flag]	true
Cybersecurity Risk Third Party Oversight and Identification Processes [Flag]	true
Cybersecurity Risk Materially Affected or Reasonably Likely to Materially Affect Registrant [Flag]	false
Cybersecurity Risk Board of Directors Oversight [Text Block]	We have processes in place for assessing, identifying and managing material risks from cybersecurity threats. In order to assess and identify material risks from cybersecurity threats, we engage a third-party managed security service provider to conduct ongoing (24x7x365) security information and event management (SIEM) monitoring to collect, aggregate and analyze data from our applications, devices, servers and users in real-time to assist our security team in detecting and blocking cybersecurity attacks. In addition, we conduct periodic security vulnerability scans as well as external and internal penetration testing that simulate attacks on our computer systems to assist with the discovery and remediation of security flaws and vulnerabilities. Management continually reassesses our cybersecurity risk environment based on changing circumstances and new information identified by our monitoring, scanning and testing, as well as third party resources. Our processes for assessing, identifying and managing cybersecurity threats have been integrated into our overall risk management processes. The information provided by these processes facilitates management’s ongoing assessment of our cybersecurity risk environment and provides current and accurate information regarding cybersecurity risks to management, our Audit Committee and Board to allow appropriate management of such risks through remediation or other risk mitigation activities. We engage various third-party cybersecurity service providers to assist with protection and monitoring of our systems and information, including with respect to protection of our e-mail and system access. These service providers are subject to an initial risk assessment as well as periodic risk assessments in order to evaluate, identify and mitigate risks from cybersecurity threats arising from our use of such service providers. Although we have taken steps to prevent and mitigate service interruptions and data security threats, the operational and security risks associated with information technology systems have increased in recent years because of the complexity of the systems and the sophistication and increasing volume of cyberattacks. We have been subject to cyberattacks, which have yet to have a material impact on our business or results of operations, but this might not always be the case in the future. For example, as previously reported, in October 2021, we detected a cyberattack that accessed and encrypted files utilized by us in the operation of our business. The incident did not have a material impact on our business, operations or financial results. Nonetheless, certain employee data was at risk during the event. Our business could be materially and adversely affected if our management information and communication systems are materially compromised or disrupted by a failure or security breach, or if we are unable to safely improve, upgrade, integrate or expand our systems as we continue to execute our growth strategy. In addition, there has also been heightened regulatory focus on data protection, and failure to comply with applicable data protection regulations or other data protection standards may expose us to litigation, fines, sanctions or other penalties, which could harm our reputation and adversely impact our business, results of operations and financial condition. Management is responsible for our day-to-day cybersecurity risk management and the Board’s responsibility is to engage in informed oversight of and provide overall direction with respect to such risk management. As part of its charter, the Audit Committee discusses with management and the independent auditors our adequacy and effectiveness of accounting and financial controls, including our systems to monitor and manage business, information technology and cybersecurity risks. On an annual basis, management prepares and presents to the Audit Committee a risk management summary that identifies risks by operational department (e.g., executive, finance, human resources, information systems, maintenance, operations, sales and marketing, risk management and safety), estimated maximum exposure per occurrence, the risk management option and insured level. The Board, its committees and management continually re-assess our cybersecurity risk environment based on changing circumstances and new information. The Audit Committee regularly discusses with management its enterprise risk management process, including our cybersecurity exposures, the steps management has taken to monitor and control such exposures and guidelines and policies to govern our risk assessment and risk management processes. The Audit Committee periodically reports to the Board regarding significant matters identified with respect to the foregoing, including, among others, our risk assessment and risk management approach to cybersecurity. Our Executive Vice President and Chief Technology Officer, Randall Baier, is responsible for our day-to-day assessment and management of cybersecurity risks. Mr. Baier also served as our Senior Vice President of Information Systems from December 2019 to August 2023, our Vice President of Information Systems from January 2014 to December 2019 and our Senior Director of Information Systems from April 2011 to January 2014. Mr. Baier advanced through various professional capacities in our information technology area including Developer, System Administrator and Database Administrator from April 1993 to April 2011. We have implemented a number of processes which allow Mr. Baier and his team to be informed about and monitor the prevention, detection, mitigation and remediation of cybersecurity incidents. These processes include, among other things, system alerts of potential malicious cyber activity, access to real-time dashboards that monitor and assess our systems, status reports provided on a daily, weekly and monthly basis and regular ongoing communications with service providers regarding potential new attack vectors and vulnerabilities. Mr. Baier shares such information with our management team and reports information about such risks to the Audit Committee.
Cybersecurity Risk Board Committee or Subcommittee Responsible for Oversight [Text Block]	We have processes in place for assessing, identifying and managing material risks from cybersecurity threats. In order to assess and identify material risks from cybersecurity threats, we engage a third-party managed security service provider to conduct ongoing (24x7x365) security information and event management (SIEM) monitoring to collect, aggregate and analyze data from our applications, devices, servers and users in real-time to assist our security team in detecting and blocking cybersecurity attacks. In addition, we conduct periodic security vulnerability scans as well as external and internal penetration testing that simulate attacks on our computer systems to assist with the discovery and remediation of security flaws and vulnerabilities. Management continually reassesses our cybersecurity risk environment based on changing circumstances and new information identified by our monitoring, scanning and testing, as well as third party resources. Our processes for assessing, identifying and managing cybersecurity threats have been integrated into our overall risk management processes. The information provided by these processes facilitates management’s ongoing assessment of our cybersecurity risk environment and provides current and accurate information regarding cybersecurity risks to management, our Audit Committee and Board to allow appropriate management of such risks through remediation or other risk mitigation activities.
Cybersecurity Risk Process for Informing Board Committee or Subcommittee Responsible for Oversight [Text Block]	Management is responsible for our day-to-day cybersecurity risk management and the Board’s responsibility is to engage in informed oversight of and provide overall direction with respect to such risk management. As part of its charter, the Audit Committee discusses with management and the independent auditors our adequacy and effectiveness of accounting and financial controls, including our systems to monitor and manage business, information technology and cybersecurity risks. On an annual basis, management prepares and presents to the Audit Committee a risk management summary that identifies risks by operational department (e.g., executive, finance, human resources, information systems, maintenance, operations, sales and marketing, risk management and safety), estimated maximum exposure per occurrence, the risk management option and insured level. The Board, its committees and management continually re-assess our cybersecurity risk environment based on changing circumstances and new information. The Audit Committee regularly discusses with management its enterprise risk management process, including our cybersecurity exposures, the steps management has taken to monitor and control such exposures and guidelines and policies to govern our risk assessment and risk management processes. The Audit Committee periodically reports to the Board regarding significant matters identified with respect to the foregoing, including, among others, our risk assessment and risk management approach to cybersecurity.
Cybersecurity Risk Role of Management [Text Block]	Management is responsible for our day-to-day cybersecurity risk management and the Board’s responsibility is to engage in informed oversight of and provide overall direction with respect to such risk management. As part of its charter, the Audit Committee discusses with management and the independent auditors our adequacy and effectiveness of accounting and financial controls, including our systems to monitor and manage business, information technology and cybersecurity risks. On an annual basis, management prepares and presents to the Audit Committee a risk management summary that identifies risks by operational department (e.g., executive, finance, human resources, information systems, maintenance, operations, sales and marketing, risk management and safety), estimated maximum exposure per occurrence, the risk management option and insured level. The Board, its committees and management continually re-assess our cybersecurity risk environment based on changing circumstances and new information. The Audit Committee regularly discusses with management its enterprise risk management process, including our cybersecurity exposures, the steps management has taken to monitor and control such exposures and guidelines and policies to govern our risk assessment and risk management processes. The Audit Committee periodically reports to the Board regarding significant matters identified with respect to the foregoing, including, among others, our risk assessment and risk management approach to cybersecurity.
Cybersecurity Risk Management Positions or Committees Responsible [Flag]	true
Cybersecurity Risk Management Positions or Committees Responsible [Text Block]	Our Executive Vice President and Chief Technology Officer, Randall Baier, is responsible for our day-to-day assessment and management of cybersecurity risks. Mr. Baier also served as our Senior Vice President of Information Systems from December 2019 to August 2023, our Vice President of Information Systems from January 2014 to December 2019 and our Senior Director of Information Systems from April 2011 to January 2014. Mr. Baier advanced through various professional capacities in our information technology area including Developer, System Administrator and Database Administrator from April 1993 to April 2011. We have implemented a number of processes which allow Mr. Baier and his team to be informed about and monitor the prevention, detection, mitigation and remediation of cybersecurity incidents. These processes include, among other things, system alerts of potential malicious cyber activity, access to real-time dashboards that monitor and assess our systems, status reports provided on a daily, weekly and monthly basis and regular ongoing communications with service providers regarding potential new attack vectors and vulnerabilities. Mr. Baier shares such information with our management team and reports information about such risks to the Audit Committee.
Cybersecurity Risk Management Expertise of Management Responsible [Text Block]	Our Executive Vice President and Chief Technology Officer, Randall Baier, is responsible for our day-to-day assessment and management of cybersecurity risks. Mr. Baier also served as our Senior Vice President of Information Systems from December 2019 to August 2023, our Vice President of Information Systems from January 2014 to December 2019 and our Senior Director of Information Systems from April 2011 to January 2014. Mr. Baier advanced through various professional capacities in our information technology area including Developer, System Administrator and Database Administrator from April 1993 to April 2011. We have implemented a number of processes which allow Mr. Baier and his team to be informed about and monitor the prevention, detection, mitigation and remediation of cybersecurity incidents. These processes include, among other things, system alerts of potential malicious cyber activity, access to real-time dashboards that monitor and assess our systems, status reports provided on a daily, weekly and monthly basis and regular ongoing communications with service providers regarding potential new attack vectors and vulnerabilities. Mr. Baier shares such information with our management team and reports information about such risks to the Audit Committee.
Cybersecurity Risk Process for Informing Management or Committees Responsible [Text Block]	Management is responsible for our day-to-day cybersecurity risk management and the Board’s responsibility is to engage in informed oversight of and provide overall direction with respect to such risk management. As part of its charter, the Audit Committee discusses with management and the independent auditors our adequacy and effectiveness of accounting and financial controls, including our systems to monitor and manage business, information technology and cybersecurity risks. On an annual basis, management prepares and presents to the Audit Committee a risk management summary that identifies risks by operational department (e.g., executive, finance, human resources, information systems, maintenance, operations, sales and marketing, risk management and safety), estimated maximum exposure per occurrence, the risk management option and insured level. The Board, its committees and management continually re-assess our cybersecurity risk environment based on changing circumstances and new information. The Audit Committee regularly discusses with management its enterprise risk management process, including our cybersecurity exposures, the steps management has taken to monitor and control such exposures and guidelines and policies to govern our risk assessment and risk management processes. The Audit Committee periodically reports to the Board regarding significant matters identified with respect to the foregoing, including, among others, our risk assessment and risk management approach to cybersecurity.
Cybersecurity Risk Management Positions or Committees Responsible Report to Board [Flag]	true

Significant Accounting Policies

Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2024
Accounting Policies [Abstract]
Consolidation, Policy [Policy Text Block]	Principles of consolidation:
Cash and Cash Equivalents, Policy [Policy Text Block]	Cash and cash equivalents: not
Receivable [Policy Text Block]	Trade accounts receivable:
Property, Plant and Equipment, Policy [Policy Text Block]	Property and equipment: Depreciation is computed based on the cost of the asset, reduced by its estimated salvage value, using the straight-line method for financial reporting purposes. We begin depreciating assets in the month that each asset is placed in service and, therefore, is ready for its intended use, and depreciate each asset until it is taken out of service and available for sale. Accelerated methods are used for income tax reporting purposes. Following is a summary of estimated useful lives for financial reporting purposes: Years Tractors 5 Trailers 7 Refrigerated containers 12 Service and other equipment 3 - 15 Buildings and improvements 20 - 40 In 2024, we replaced our company-owned tractors within an average of 3.9 years and our trailers within an average of 8.4 years after purchase. Our useful lives for depreciating tractors is five seven no five seven Long-lived assets are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable. Recoverability of assets to be held and used is measured by a comparison of the carrying amount of an asset to future net undiscounted cash flows expected to be generated by the asset. If such assets are considered to be impaired, the impairment to be recognized is measured by the amount by which the carrying amount of the assets exceeds the fair value of the assets. Assets to be disposed of are reported at the lower of the carrying amount or fair value less the costs to sell.
Tires In Service [Policy Text Block]	Tires in service:
Income Tax, Policy [Policy Text Block]	Income taxes: In the ordinary course of business there is inherent uncertainty in quantifying our income tax positions. We assess our income tax positions and record tax benefits for all years subject to examination based upon management’s evaluation of the facts, circumstances and information available at the reporting dates. For those tax positions where it is more-likely-than-not that a tax benefit will be sustained, we have recorded the largest amount of tax benefit with a greater than 50% likelihood of being realized upon ultimate settlement with a taxing authority that has full knowledge of all relevant information. For those income tax positions where it is not more-likely-than-not that a tax benefit will be sustained, no tax benefit has been recognized in the financial statements. Potential accrued interest and penalties related to unrecognized tax benefits are recognized as a component of income tax expense.
Self Insurance Reserve [Policy Text Block]	Insurance and claims:
Revenue from Contract with Customer [Policy Text Block]	Revenue recognition: Revenue from Contracts with Customers We account for revenue of our Intermodal and Brokerage segments and revenue on freight transported by independent contractors within our Truckload and Dedicated segments on a gross basis because we are the principal service provider controlling the promised service before it is transferred to each customer. We are primarily responsible for fulfilling the promise to provide each specified service to each customer. We bear the primary risk of loss in the event of cargo claims by our customers. We also have complete control and discretion in establishing the price for each specified service. Accordingly, all such revenue billed to customers is classified as operating revenue and all corresponding payments to carriers for transportation services we arrange in connection with brokerage and intermodal activities and to independent contractor providers of revenue equipment are classified as purchased transportation expense within our consolidated statements of operations. See Note 14 for more information. Our largest customer, Walmart, accounted for 20% of our revenue excluding fuel surcharges in 2024 and 21% of our trade receivables as of December 31, 2024, 19% of our revenue in 2023 and 19% of our trade receivables as of December 31, 2023, and 21% of our revenue in 2022. During each of 2024, 2023 and 2022, approximately 99% of our revenue was generated within the United States.
Share-Based Payment Arrangement [Policy Text Block]	Share-based payment arrangement compensation: Compensation-Stock Compensation
Earnings Per Share, Policy [Policy Text Block]	Earnings per common share:
Segment Reporting, Policy [Policy Text Block]	Segment reporting: Segment Reporting six four
Use of Estimates, Policy [Policy Text Block]	Use of estimates:
New Accounting Pronouncements, Policy [Policy Text Block]	Adoption of new accounting standard:

Note 1 - Summary of Significa_2

Note 1 - Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2024
Notes Tables
Property, Plant and Equipment [Table Text Block]	Years Tractors 5 Trailers 7 Refrigerated containers 12 Service and other equipment 3 - 15 Buildings and improvements 20 - 40

Note 2 - Details of Consolida_2

Note 2 - Details of Consolidated Balance Sheet Accounts (Tables)	12 Months Ended
	Dec. 31, 2024
Notes Tables
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Table Text Block]	(In thousands) 2024 2023 License fees $ 5,863 $ 5,557 Parts and tires inventory 5,694 6,286 Insurance premiums 5,324 4,608 Tires in service 4,582 4,984 Contract assets 1,584 2,106 Other 2,841 3,971 $ 25,888 $ 27,512
Schedule of Accrued Liabilities [Table Text Block]	(In thousands) 2024 2023 Accrued expenses $ 10,243 $ 10,575 Vacation 8,377 9,612 Salaries and wages 1,429 3,800 Accrued income taxes 1,065 - Other 2,378 2,722 $ 23,492 $ 26,709

Note 5 - Income Taxes (Tables)

Note 5 - Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2024
Notes Tables
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]	(In thousands) 2024 2023 2022 Current: Federal $ 21,254 $ 33,416 $ 18,025 State 3,598 4,706 3,914 Total current 24,852 38,122 21,939 Deferred: Federal (12,748 ) (13,526 ) 9,795 State (2,680 ) (1,053 ) 2,083 Total deferred (15,428 ) (14,579 ) 11,878 Total expense $ 9,424 $ 23,543 $ 33,817
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]	2024 2023 2022 Federal statutory income tax rate 21 % 21 % 21 % Increase in taxes arising from state income taxes, net of federal income tax benefit 2 3 3 Per diem and other non-deductible expenses 4 2 - Federal tax credits (1 ) - - Other, net - (1 ) (1 ) Effective tax rate 26 % 25 % 23 %
Schedule of Deferred Tax Assets and Liabilities [Table Text Block]	(In thousands) 2024 2023 Deferred tax assets: Reserves and accrued liabilities $ 12,347 $ 13,126 Other 1,454 1,212 13,801 14,338 Deferred tax liabilities: Depreciation 117,595 133,634 Prepaid expenses 3,240 3,166 120,835 136,800 Net deferred tax liability $ 107,034 $ 122,462

Note 6 - Earnings Per Common _2

Note 6 - Earnings Per Common Share (Tables)	12 Months Ended
	Dec. 31, 2024
Notes Tables
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]	(In thousands, except per share amounts) 2024 2023 2022 Numerator: Net income $ 26,922 $ 70,373 $ 110,354 Denominator: Basic earnings per common share - weighted-average shares 81,406 81,272 81,692 Effect of dilutive stock options 66 141 267 Diluted earnings per common share - weighted-average shares and assumed conversions 81,472 81,413 81,959 Basic earnings per common share $ 0.33 $ 0.87 $ 1.35 Diluted earnings per common share $ 0.33 $ 0.86 $ 1.35

Note 9 - Leases (Tables)

Note 9 - Leases (Tables)	12 Months Ended
	Dec. 31, 2024
Notes Tables
Lease, Balance Sheet Classification [Table Text Block]	(In thousands) 2024 2023 Assets: Other noncurrent assets $ 578 $ 517 Liabilities: Accrued and other current liabilities 296 268 Noncurrent operating lease liabilities 282 249 Total liabilities $ 578 $ 517
Lessee, Operating Lease, Liability, to be Paid, Maturity [Table Text Block]	Amount Maturities: 2025 $ 318 2026 233 2027 65 2028 11 Total lease payments 627 Adjust to present value (49 ) Total operating lease liabilities $ 578

Note 10 - Employee Benefits (Ta

Note 10 - Employee Benefits (Tables)	12 Months Ended
	Dec. 31, 2024
Notes Tables
Schedule of Share-Based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]	2024 2023 2022 Expected option life in years (1) 6.0 6.0 6.0 Expected stock price volatility percentage (2) 27 % 28 % 26 % Risk-free interest rate percentage (3) 4.3 % 4.1 % 2.9 % Expected dividend yield (4) 1.38 % 1.14 % 1.13 % Fair value as of the date of grant $ 5.26 $ 6.63 $ 5.79
Share-Based Payment Arrangement, Option, Activity [Table Text Block]	Shares Weighted- Average Exercise Price Outstanding at December 31, 2023 838,150 $ 16.65 Granted 28,000 17.77 Exercised (99,829 ) 13.05 Forfeited (61,900 ) 17.26 Outstanding at December 31, 2024 704,421 $ 17.17 Exercisable at December 31, 2024 441,921 $ 16.23
Schedule of Nonvested Share Activity [Table Text Block]	Shares Weighted- Average Grant Date Fair Value Weighted- Average Remaining Contractual Life (in Years) Nonvested at December 31, 2023 406,300 $ 4.88 5.0 Granted 28,000 5.26 6.6 Vested (128,300 ) 4.67 3.6 Forfeited (43,500 ) 4.57 4.2 Nonvested at December 31, 2024 262,500 $ 5.07 4.4
Schedule of Nonvested Restricted Stock Units Activity [Table Text Block]	Shares Weighted-Average Grant Date Fair Value Nonvested at December 31, 2023 188,400 $ 19.51 Granted 125,464 17.54 Vested (49,162 ) (1) 18.34 Forfeited (9,148 ) 20.26 Nonvested at December 31, 2024 255,554 $ 18.77

Note 14 - Revenue and Busines_2

Note 14 - Revenue and Business Segments (Tables)	12 Months Ended
	Dec. 31, 2024
Notes Tables
Schedule of Segment Reporting Information, by Segment [Table Text Block]	(In thousands) 2024 2023 2022 Operating revenue: Truckload revenue, net of fuel surcharge revenue $ 377,452 $ 395,565 $ 411,448 Truckload fuel surcharge revenue 62,340 69,910 89,014 Total Truckload revenue 439,792 465,475 500,462 Dedicated revenue, net of fuel surcharge revenue 267,077 334,962 336,973 Dedicated fuel surcharge revenue 52,058 73,310 92,119 Total Dedicated revenue 319,135 408,272 429,092 Intermodal revenue, net of fuel surcharge revenue 49,468 75,887 100,452 Intermodal fuel surcharge revenue 9,286 16,191 29,313 Total Intermodal revenue 58,754 92,078 129,765 Brokerage revenue 146,027 165,630 204,559 Total operating revenue $ 963,708 $ 1,131,455 $ 1,263,878 Operating income/(loss): Truckload $ 3,283 $ 24,835 $ 59,392 Dedicated 23,037 48,377 50,566 Intermodal (3,922 ) (156 ) 10,639 Brokerage 10,822 17,054 22,747 Total operating income $ 33,220 $ 90,110 $ 143,344 (In thousands) Truckload Dedicated Intermodal Brokerage Total Operating revenue $ 439,792 $ 319,135 $ 58,754 $ 146,027 $ 963,708 Operating expense (income): Salaries, wages and benefits 185,871 137,340 11,028 7,493 341,732 Purchased transportation 4,520 10,568 31,612 122,442 169,142 Fuel and fuel taxes 88,868 52,925 5,350 - 147,143 Supplies and maintenance 39,925 20,141 3,285 (14 ) 63,337 Depreciation 64,074 39,452 6,076 2,051 111,653 Operating taxes and licenses 5,577 4,066 330 329 10,302 Insurance and claims 29,693 21,025 1,617 774 53,109 Communications and utilities 5,121 2,861 223 824 9,029 Gain on disposition of revenue equipment (2,683 ) (2,111 ) (177 ) - (4,971 ) Other 15,543 9,831 3,332 1,306 30,012 Total operating expenses 436,509 296,098 62,676 135,205 930,488 Operating income/(loss) $ 3,283 $ 23,037 $ (3,922 ) $ 10,822 $ 33,220 Operating ratio 99.3 % 92.8 % 106.7 % 92.6 % 96.6 % Operating ratio, net of fuel surcharges 99.1 % 91.4 % 107.9 % 92.6 % 96.0 % (In thousands) Truckload Dedicated Intermodal Brokerage Total Operating revenue $ 465,475 $ 408,272 $ 92,078 $ 165,630 $ 1,131,455 Operating expense (income): Salaries, wages and benefits 189,010 165,257 17,666 6,885 378,818 Purchased transportation 4,958 10,778 47,531 136,067 199,334 Fuel and fuel taxes 98,852 73,083 8,502 - 180,437 Supplies and maintenance 37,495 26,061 3,826 29 67,411 Depreciation 61,644 46,151 7,071 1,856 116,722 Operating taxes and licenses 5,483 4,881 470 219 11,053 Insurance and claims 28,460 24,503 2,341 710 56,014 Communications and utilities 5,064 3,727 359 999 10,149 Gain on disposition of revenue equipment (6,694 ) (6,304 ) (614 ) - (13,612 ) Other 16,368 11,758 5,082 1,811 35,019 Total operating expenses 440,640 359,895 92,234 148,576 1,041,345 Operating income/(loss) $ 24,835 $ 48,377 $ (156 ) $ 17,054 $ 90,110 Operating ratio 94.7 % 88.2 % 100.2 % 89.7 % 92.0 % Operating ratio, net of fuel surcharges 93.7 % 85.6 % 100.2 % 89.7 % 90.7 % (In thousands) Truckload Dedicated Intermodal Brokerage Total Operating revenue $ 500,462 $ 429,092 $ 129,765 $ 204,559 $ 1,263,878 Operating expense (income): Salaries, wages and benefits 188,131 172,179 21,602 8,392 390,304 Purchased transportation 4,835 9,559 65,271 170,127 249,792 Fuel and fuel taxes 114,306 91,091 13,174 - 218,571 Supplies and maintenance 30,495 21,268 4,028 (91 ) 55,700 Depreciation 56,365 45,630 7,493 1,526 111,014 Operating taxes and licenses 5,037 4,855 516 355 10,763 Insurance and claims 25,848 21,723 2,268 674 50,513 Communications and utilities 4,548 3,471 412 746 9,177 Gain on disposition of revenue equipment (6,308 ) (6,386 ) (685 ) - (13,379 ) Other 17,813 15,136 5,047 83 38,079 Total operating expenses 441,070 378,526 119,126 181,812 1,120,534 Operating income $ 59,392 $ 50,566 $ 10,639 $ 22,747 $ 143,344 Operating ratio 88.1 % 88.2 % 91.8 % 88.9 % 88.7 % Operating ratio, net of fuel surcharges 85.6 % 85.0 % 89.4 % 88.9 % 86.4 %

Note 1 - Summary of Significa_3

Note 1 - Summary of Significant Accounting Policies (Details Textual)	12 Months Ended
	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)
Number of Operating Segments	6
Loss on Deposits Above FDIC Amount	$ 0
Accounts Receivable, Allowance for Credit Loss, Current	496,000	$ 497,000
Letters of Credit Outstanding, Amount	$ 23,100,000	$ 20,700,000
Number of Reportable Segments	4
Revenue Benchmark [Member] | Customer Concentration Risk [Member] | Walmart [Member]
Concentration Risk, Percentage	20%	19%	21%
Revenue Benchmark [Member] | Geographic Concentration Risk [Member] | UNITED STATES
Concentration Risk, Percentage	99%	99%	99%
Accounts Receivable [Member] | Customer Concentration Risk [Member] | Walmart [Member]
Concentration Risk, Percentage	21%	19%
Uninsured Risk [Member] | Auto Liability Claim [Member]
Loss Contingency Range Possible Loss Per Claim	$ 2,000,000
Uninsured Risk [Member] | Workers Compensation Liability Claim [Member]
Loss Contingency Range Possible Loss Per Claim	750,000
Insurance Claims [Member]
Letters of Credit Outstanding, Amount	23,100,000
Supplies and Maintenance Costs [Member]
Amortization	$ 6,900,000	$ 7,200,000	$ 6,600,000
Tractor [Member]
Replacement Of Equipment Period After Purchase (Year)	3 years 10 months 24 days
Useful life (Year)	5 years	5 years
Property, Plant and Equipment, Salvage Value, Percentage	25%
Trailer [Member]
Replacement Of Equipment Period After Purchase (Year)	8 years 4 months 24 days
Useful life (Year)	7 years	7 years
Property, Plant and Equipment, Salvage Value, Percentage	35%
Refrigerated Containers [Member]
Useful life (Year)	12 years	12 years
Property, Plant and Equipment, Salvage Value, Percentage	0%
Tires In Service [Member]
Useful life (Year)		24 months

Note 1 - Summary of Significa_4

Note 1 - Summary of Significant Accounting Policies - Estimated Useful Lives (Details)	Dec. 31, 2024	Dec. 31, 2023
Tractor [Member]
Useful life (Year)	5 years	5 years
Trailer [Member]
Useful life (Year)	7 years	7 years
Refrigerated Containers [Member]
Useful life (Year)	12 years	12 years
Service And Other Equipment [Member] | Minimum [Member]
Useful life (Year)	3 years
Service And Other Equipment [Member] | Maximum [Member]
Useful life (Year)	15 years
Building and Building Improvements [Member] | Minimum [Member]
Useful life (Year)	20 years
Building and Building Improvements [Member] | Maximum [Member]
Useful life (Year)	40 years

Note 2 - Details of Consolida_3

Note 2 - Details of Consolidated Balance Sheet Accounts - Prepaid Expenses and Other (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Insurance premiums	$ 5,324	$ 4,608
Contract assets	1,584	2,106
Other	2,841	3,971
Prepaid Expense and Other Assets, Current	25,888	27,512
License Fees Member [Member]
Prepaid expenses	5,863	5,557
Parts And Tires Inventory [Member]
Prepaid expenses	5,694	6,286
Tires In Service [Member]
Prepaid expenses	$ 4,582	$ 4,984

Note 2 - Details of Consolida_4

Note 2 - Details of Consolidated Balance Sheet Accounts - Accrued Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Accrued expenses	$ 10,243	$ 10,575
Vacation	8,377	9,612
Salaries and wages	1,429	3,800
Accrued income taxes	1,065	0
Other	2,378	2,722
Accrued Liabilities, Current	$ 23,492	$ 26,709

Note 3 - Long-term Debt (Detail

Note 3 - Long-term Debt (Details Textual) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Line of Credit Facility, Maximum Borrowing Capacity	$ 30
Letters of Credit Outstanding, Amount	23.1	$ 20.7
Line of Credit Facility, Remaining Borrowing Capacity	6.9
Line of Credit Facility, Dividends Payment, Maximum	$ 150
Line Of Credit Facility Dividend Restrictions Percentage Of Net Income Limit		25%
Line of Credit Facility Dividend Restrictions Percentage of Net Income Limit1			25%
Line of Credit Facility, Waiver to Pay Dividends, Maximum			$ 80
Credit Facility [Member]
Long-Term Debt, Weighted Average Interest Rate, at Point in Time	7.50%

Note 4 - Related Party Transa_2

Note 4 - Related Party Transactions (Details Textual) - USD ($)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Tire Purchases [Member]
Accounts Payable	$ 0	$ 0
Director [Member] | Construction Projects [Member]
Related Party Transaction, Amounts of Transaction	8,000	8,000	$ 10,000
Building Construction [Member]
Accounts Payable	0	0
Purchase of Fuel, Tires and Related Services [Member]
Related Party Transaction, Amounts of Transaction	27,000	195,000	$ 477,000
Tire Purchases [Member]
Related Party Transaction, Amounts of Transaction	$ 2,200,000	$ 2,000,000

Note 5 - Income Taxes (Details

Note 5 - Income Taxes (Details Textual) - USD ($)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Unrecognized Tax Benefits	$ 386,000	$ 434,000
Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities	48,000
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	305,000
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense	$ 14,000	$ 14,000
Open Tax Year	2021

Note 5 - Income Taxes - Compone

Note 5 - Income Taxes - Components of Provision for Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Current:
Federal	$ 21,254	$ 33,416	$ 18,025
State	3,598	4,706	3,914
Total current	24,852	38,122	21,939
Deferred:
Federal	(12,748)	(13,526)	9,795
State	(2,680)	(1,053)	2,083
Total deferred	(15,428)	(14,579)	11,878
Total expense	$ 9,424	$ 23,543	$ 33,817

Note 5 - Income Taxes - Federal

Note 5 - Income Taxes - Federal Income Tax Reconciled to the Effective Income Tax Rate (Details)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Federal statutory income tax rate	21%	21%	21%
Increase in taxes arising from state income taxes, net of federal income tax benefit	2%	3%	3%
Per diem and other non-deductible expenses	4%	2%	0%
Federal tax credits	(1.00%)	0%	0%
Other, net	0%	(1.00%)	(1.00%)
Effective tax rate	26%	25%	23%

Note 5 - Income Taxes - Net Def

Note 5 - Income Taxes - Net Deferred Tax Liability (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Deferred tax assets:
Reserves and accrued liabilities	$ 12,347	$ 13,126
Other	1,454	1,212
Deferred Tax Assets, Gross	13,801	14,338
Deferred tax liabilities:
Depreciation	117,595	133,634
Prepaid expenses	3,240	3,166
Deferred Tax Liabilities, Gross	120,835	136,800
Net deferred tax liability	$ 107,034	$ 122,462

Note 6 - Earnings Per Common _3

Note 6 - Earnings Per Common Share (Details Textual) - shares	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Share-Based Payment Arrangement, Option [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	504,500	173,300	541,500
Unvested Performance Unit Awards [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	112,250	106,582	16,632

Note 6 - Earnings per Common _4

Note 6 - Earnings per Common Share - Basic and Diluted Earnings Per Common Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Numerator:
Net income	$ 26,922	$ 70,373	$ 110,354
Denominator:
Basic earnings per common share - weighted-average shares (in shares)	81,406	81,272	81,692
Effect of dilutive stock options (in shares)	66	141	267
Diluted earnings per common share - weighted-average shares and assumed conversions (in shares)	81,472	81,413	81,959
Basic earnings per common share (in dollars per share)	$ 0.33	$ 0.87	$ 1.35
Diluted earnings per common share (in dollars per share)	$ 0.33	$ 0.86	$ 1.35

Note 7 - Share Repurchase Pro_2

Note 7 - Share Repurchase Program (Details Textual) $ in Thousands		3 Months Ended				12 Months Ended
	Aug. 13, 2020	Dec. 31, 2022 shares	Sep. 30, 2022 shares	Jun. 30, 2022 USD ($) shares	Mar. 31, 2022 USD ($) shares	Dec. 31, 2024 USD ($) shares	Dec. 31, 2023 shares	Dec. 31, 2022 USD ($)	May 03, 2022 USD ($) shares	Aug. 31, 2020 shares	Aug. 31, 2019 USD ($) shares
Share Repurchase Program, Authorized, Amount | $									$ 50,000		$ 34,000
Share Repurchase Program, Authorized, Number of Shares | shares									3,100,000	2,700,000	1,800,000
Stock Repurchased and Retired During Period, Shares | shares		0	0	963,000	1,300,000	0	0
Stock Repurchased and Retired During Period, Value | $				$ 16,800	$ 25,000			$ 41,753
Share Repurchase Program, Remaining Authorized, Amount | $						$ 33,200
Share Repurchase Program, Remaining Authorized, Number of Shares | shares						2,200,000
Stock Split To [Member]
Stockholders' Equity Note, Stock Split, Conversion Ratio	3
Stock Split from [Member]
Stockholders' Equity Note, Stock Split, Conversion Ratio	2

Note 8 - Dividends (Details Tex

Note 8 - Dividends (Details Textual) - USD ($) $ / shares in Units, $ in Thousands

3 Months Ended

12 Months Ended

Dec. 31, 2024

Sep. 30, 2024

Jun. 30, 2024

Mar. 31, 2024

Dec. 31, 2023

Sep. 30, 2023

Jun. 30, 2023

Mar. 31, 2023

Dec. 31, 2022

Sep. 30, 2022

Jun. 30, 2022

Mar. 31, 2022

Dec. 31, 2024

Dec. 31, 2023

Dec. 31, 2022

Common Stock, Dividends, Per Share, Declared

$ 0.24

$ 0.24

$ 0.24

Payments of Ordinary Dividends, Common Stock

$ 19,540

$ 19,509

$ 19,563

O 2024 Q1 Dividends [Member]

Common Stock, Dividends, Per Share, Declared

$ 0.06

O 2024 Q2 Dividends [Member]

Common Stock, Dividends, Per Share, Declared

$ 0.06

O 2024 Q3 Dividends [Member]

Common Stock, Dividends, Per Share, Declared

$ 0.06

O 2024 Q4 Dividends [Member]

Common Stock, Dividends, Per Share, Declared

$ 0.06

O 2023 Q1 Dividends [Member]

Common Stock, Dividends, Per Share, Declared

$ 0.06

O 2023 Q2 Dividends [Member]

Common Stock, Dividends, Per Share, Declared

$ 0.06

O 2023 Q3 Dividends [Member]

Common Stock, Dividends, Per Share, Declared

$ 0.06

O 2023 Q4 Dividends [Member]

Common Stock, Dividends, Per Share, Declared

$ 0.06

O 2022 Q1 Dividends [Member]

Common Stock, Dividends, Per Share, Declared

$ 0.06

O 2022 Q2 Dividends [Member]

Common Stock, Dividends, Per Share, Declared

$ 0.06

O 2022 Q3 Dividends [Member]

Common Stock, Dividends, Per Share, Declared

$ 0.06

O 2022 Q4 Dividends [Member]

Common Stock, Dividends, Per Share, Declared

$ 0.06

Note 9 - Leases (Details Textua

Note 9 - Leases (Details Textual) - USD ($)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Operating Lease, Weighted Average Remaining Lease Term (Month)	27 months	33 months
Operating Lease, Weighted Average Discount Rate, Percent	6.50%	5.10%
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability	$ 253,000	$ 89,000
Operating Lease, Payments	307,000	332,000
Operating Lease, Cost	5,200,000	6,500,000
Short-Term Lease, Cost	$ 4,900,000	$ 6,200,000
Minimum [Member]
Lessee, Operating Lease, Renewal Term (Month)	6 months
Maximum [Member]
Lessee, Operating Lease, Renewal Term (Month)	5 years

Note 9 - Leases - Operating Lea

Note 9 - Leases - Operating Leases Balance Sheet Information (Details) - USD ($) $ in Thousands		Dec. 31, 2024	Dec. 31, 2023
Other noncurrent assets (a)	[1]	$ 578	$ 517
Accrued and other current liabilities		296	268
Noncurrent operating lease liabilities		282	249
Total liabilities		$ 578	$ 517
[1]Operating lease asset balances at December 31, 2024 and 2023.

Note 9 - Leases - Operating L_2

Note 9 - Leases - Operating Leases Balance Sheet Information (Details) (Parentheticals)	Dec. 31, 2024	Dec. 31, 2023
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Other noncurrent assets	Other noncurrent assets
Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]	Accrued and other current liabilities	Accrued and other current liabilities
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]	Noncurrent operating lease liabilities	Noncurrent operating lease liabilities
Operating Lease, Liability, Statement of Financial Position [Extensible Enumeration]	us-gaap_Liabilities	us-gaap_Liabilities

Note 9 - Leases - Maturity of O

Note 9 - Leases - Maturity of Operating Lease Liabilities (Details) - USD ($)	Dec. 31, 2024	Dec. 31, 2023
2025	$ 318,000
2026	233,000
2027	65,000
2028	11,000
Total lease payments	627,000
Adjust to present value	(49,000)
Total operating lease liabilities	$ 578,000	$ 517,000

Note 10 - Employee Benefits (De

Note 10 - Employee Benefits (Details Textual)			1 Months Ended										12 Months Ended
	Aug. 13, 2020 $ / shares shares	May 07, 2019 shares	May 31, 2024 shares	May 31, 2023 shares	Aug. 31, 2022 shares	May 31, 2022 shares	May 31, 2021 shares	May 31, 2020 shares	May 31, 2019 shares	Dec. 31, 2018 shares	Aug. 31, 2018 shares	May 31, 2018 shares	Dec. 31, 2024 USD ($) $ / shares shares	Dec. 31, 2023 USD ($) $ / shares shares	Dec. 31, 2022 USD ($) $ / shares
Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Granted | shares													2,781,347
Common Stock, Par or Stated Value Per Share | $ / shares													$ 0.01	$ 0.01
Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Forfeiture Rate Of Unvested Outstanding Awards													1.25%
Share-Based Payment Arrangement, Expense													$ 2,236,000	$ 2,319,000	$ 2,814,000
Share-Based Payment Arrangement, Expense, after Tax													$ 1,700,000	$ 1,700,000	$ 2,200,000
Share Based Compensation Expense Net Of Tax Amount Per Basic Share (in dollars per share) | $ / shares													$ 0.02	$ 0.02	$ 0.03
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Number | shares													704,421	838,150
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term													3 years 3 months 18 days
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Intrinsic Value													$ 339,000
Exercisable, shares (in shares) | shares													441,921
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term													2 years 8 months 12 days
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Intrinsic Value													$ 332,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period, Intrinsic Value													521,000	$ 1,100,000	$ 2,000,000
Proceeds from Stock Options Exercised													1,800,000	2,400,000	4,000,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested in Period, Fair Value													$ 599,000	744,000	691,000
Defined Contribution Plan, Employer Matching Contribution, Percent of Match													35%
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay													6%
Defined Contribution Plan, Employers Matching Contribution, Annual Vesting Percentage													20%
Defined Contribution Plan, Employer Discretionary Contribution Amount													$ 0	0	0
Defined Contribution Plan, Cost													3,400,000	3,900,000	4,000,000
Retirement Savings Plan, Participants Less Than 50 Years Old [Member]
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Amount													23,000
Retirement Savings Plan, Participants Over50 Years Old [Member]
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Amount													$ 30,500
Stock Split To [Member]
Stockholders' Equity Note, Stock Split, Conversion Ratio	3
Stock Split from [Member]
Stockholders' Equity Note, Stock Split, Conversion Ratio	2
Stock Split [Member]
Common Stock, Par or Stated Value Per Share | $ / shares	$ 0.01
Stockholders' Equity Note, Stock Split, Dividend Settlement, Percent	50%
Performance Shares [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period													5 years
Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Reserved For Issuance Under Awards Outstanding | shares													704,421
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value													$ 901,000
Performance Shares [Member] | Awards Paid to Employees Upon Vesting [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Granted | shares			125,464	114,044	21,000	102,900	98,400	73,205	45,000	3,000	3,000	42,000
Performance Shares [Member] | One Half of Awards Paid Immediately Upon Vesting and One Half Credited to Employees' Accounts [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Granted | shares									60,000
Unvested Service Based Option Awards [Member]
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount													$ 1,200,000
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition													2 years 4 months 24 days
Unvested Performance Unit Awards [Member]
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount													$ 4,800,000
Service Based Options [Member]
Shares Granted, Value, Share-Based Payment Arrangement, before Forfeiture													$ 147,000	$ 258,000	$ 819,000
2015 Equity Incentive Plan [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Additional Shares Authorized | shares		1,300,000
2015 Equity Incentive Plan [Member] | Stock Split [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Additional Shares Authorized | shares	3,950,000
2015 Equity Incentive Plan [Member] | Share-Based Payment Arrangement, Option [Member]
Share Based Compensation Arrangement By Share Based Payment Award Annual Percentage Of Award Which Vests													20%
2015 Equity Incentive Plan [Member] | Performance Shares [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Granted | shares												68,550
Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Reserved For Issuance Under Awards Outstanding | shares													298,791
2015 Equity Incentive Plan [Member] | Full Value Awards [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Additional Shares Authorized | shares		558,334
Minimum [Member] | 2015 Equity Incentive Plan [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period													7 years
Maximum [Member] | 2015 Equity Incentive Plan [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period													10 years

Note 10 - Employee Benefits - S

Note 10 - Employee Benefits - Stock Options Valuation Assumptions (Details) - $ / shares		12 Months Ended
		Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Expected option life in years(1) (Year)	[1]	6 years	6 years	6 years
Expected stock price volatility percentage(2)	[2]	27%	28%	26%
Risk-free interest rate percentage(3)	[3]	4.30%	4.10%	2.90%
Expected dividend yield(4)	[4]	1.38%	1.14%	1.13%
Fair value as of the date of grant (in dollars per share)		$ 5.26	$ 6.63	$ 5.79
[1]Expected option life – We use historical employee exercise and option expiration data to estimate the expected life assumption for the Black-Scholes grant-date valuation. We believe that this historical data is currently the best estimate of the expected term of a new option. We use a weighted-average expected life for all awards.[2]Expected stock price volatility – We use our stock’s historical volatility for the same period of time as the expected life. We have no reason to believe that its future volatility will differ from the past.[3]Risk-free interest rate – The rate is based on the U.S. Treasury yield curve in effect at the time of the grant for the same period of time as the expected life.[4]Expected dividend yield – The calculation is based on the total expected annual dividend payout divided by the average stock price.

Note 10 - Employee Benefits - O

Note 10 - Employee Benefits - Option Activity (Details)	12 Months Ended
	Dec. 31, 2024 $ / shares shares
Balance (in shares) | shares	838,150
Balance (in dollars per share) | $ / shares	$ 16.65
Granted, shares (in shares) | shares	28,000
Granted, weighted average exercise price (in dollars per share) | $ / shares	$ 17.77
Exercised, shares (in shares) | shares	(99,829)
Exercised, weighted average exercise price (in dollars per share) | $ / shares	$ 13.05
Forfeited, shares (in shares) | shares	(61,900)
Forfeited, weighted average exercise price (in dollars per share) | $ / shares	$ 17.26
Balance, shares (in shares) | shares	704,421
Balance, weighted average exercise price (in dollars per share) | $ / shares	$ 17.17
Exercisable, shares (in shares) | shares	441,921
Exercisable, weighted average exercise price (in dollars per share) | $ / shares	$ 16.23

Note 10 - Employee Benefits - N

Note 10 - Employee Benefits - Non-vested Option Awards Activity (Details) - $ / shares	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Granted, shares (in shares)	28,000
Granted, weighted average grant date fair value (in dollars per share)	$ 5.26	$ 6.63	$ 5.79
Forfeited, shares (in shares)	(61,900)
Service Based Options [Member]
Beginning of period, nonvested, shares (in shares)		406,300
Beginning of period, nonvested, weighted average grant date fair value (in dollars per share)		$ 4.88
Nonvested, weighted average remaining contractual life (Year)	4 years 4 months 24 days	5 years
Granted, shares (in shares)	28,000
Granted, weighted average grant date fair value (in dollars per share)	$ 5.26
Granted, weighted average remaining contractual life (Year)	6 years 7 months 6 days
Vested, shares (in shares)	(128,300)
Vested, weighted average grant date fair value (in dollars per share)	$ 4.67
Vested, weighted average remaining contractual life (Year)	3 years 7 months 6 days
Forfeited, shares (in shares)	(43,500)
Forfeited, weighted average grant date fair value (in dollars per share)	$ 4.57
Forfeited, weighted average remaining contractual life (Year)	4 years 2 months 12 days
End of period, nonvested, shares (in shares)	262,500		406,300
End of period, nonvested, weighted average grant date fair value (in dollars per share)	$ 5.07		$ 4.88

Note 10 - Employee Benefits -_2

Note 10 - Employee Benefits - Non-vested Performance Unit Award Activity (Details) - Performance Shares [Member]	12 Months Ended
	Dec. 31, 2024 $ / shares shares
Nonvested, shares (in shares) | shares	188,400
Nonvested, weighted average grant date fair value (in dollars per share) | $ / shares	$ 19.51
Granted, shares (in shares) | shares	125,464
Granted, weighted average grant date fair value (in dollars per share) | $ / shares	$ 17.54
Vested, shares (in shares) | shares	(49,162)
Vested, weighted average grant date fair value (in dollars per share) | $ / shares	$ 18.34
Forfeited, shares (in shares) | shares	(9,148)
Forfeited, weighted average grant date fair value (in dollars per share) | $ / shares	$ 20.26
Nonvested, shares (in shares) | shares	255,554
Nonvested, weighted average grant date fair value (in dollars per share) | $ / shares	$ 18.77

Note 13 - Commitments and Con_2

Note 13 - Commitments and Contingencies (Details Textual)	Dec. 31, 2024 USD ($)
Lessee, Operating Lease, Liability, to be Paid, Total	$ 627,000
Capital Addition Purchase Commitments [Member] | Revenue Equipment [Member]
Purchase Obligation, to be Paid, Remainder of Fiscal Year	$ 191,200,000

Note 14 - Revenue and Busines_3

Note 14 - Revenue and Business Segments (Details Textual) $ in Thousands	12 Months Ended
	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)
Number of Operating Segments	6
Number of Reportable Segments	4
Customer Contract Term (Year)	1 year
Capitalized Contract Cost, Impairment Loss	$ 0	$ 0
Prepaid Expenses and Other Current Assets [Member]
Contract with Customer, Asset, after Allowance for Credit Loss, Total	$ 1,600	$ 2,100
Dedicated [Member] | Minimum [Member]
Customer Contract Term (Year)	3 years
Dedicated [Member] | Maximum [Member]
Customer Contract Term (Year)	5 years

Note 14 - Revenue and Busines_4

Note 14 - Revenue and Business Segments - Operating Revenue and Operating Income by Segment (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)
Operating revenue:
Operating revenue	$ 963,708	$ 1,131,455	$ 1,263,878
Operating expenses (income):
Operating revenue	963,708	1,131,455	1,263,878
Salaries, wages and benefits	341,732	378,818	390,304
Purchased transportation	169,142	199,334	249,792
Fuel and fuel taxes	147,143	180,437	218,571
Supplies and maintenance	63,337	67,411	55,700
Depreciation	111,653	116,722	111,014
Operating taxes and licenses	10,302	11,053	10,763
Operating income/(loss):
Operating taxes and licenses	10,302	11,053	10,763
Operating Income	33,220	90,110	143,344
Insurance and claims	53,109	56,014	50,513
Communications and utilities	9,029	10,149	9,177
Other	30,012	35,019	38,079
Total operating expenses	930,488	1,041,345	1,120,534
Operating income	33,220	90,110	143,344
Revenue Equipment [Member]
Operating income/(loss):
Gain on disposition of revenue equipment	(4,971)	(13,612)	(13,379)
Operating Segments [Member]
Operating revenue:
Operating revenue	963,708	1,131,455	1,263,878
Operating expenses (income):
Operating revenue	963,708	1,131,455	1,263,878
Salaries, wages and benefits	341,732	378,818	390,304
Purchased transportation	169,142	199,334	249,792
Fuel and fuel taxes	147,143	180,437	218,571
Supplies and maintenance	63,337	67,411	55,700
Depreciation	111,653	116,722	111,014
Operating taxes and licenses	10,302	11,053	10,763
Operating income/(loss):
Operating taxes and licenses	10,302	11,053	10,763
Operating Income	33,220	90,110	143,344
Insurance and claims	53,109	56,014	50,513
Communications and utilities	9,029	10,149	9,177
Other	30,012	35,019	38,079
Total operating expenses	930,488	1,041,345	1,120,534
Operating income	$ 33,220	$ 90,110	$ 143,344
Operating ratio	0.966	0.92	0.887
Operating ratio, net of fuel surcharges	0.96	0.907	0.864
Operating Segments [Member] | Revenue Equipment [Member]
Operating income/(loss):
Gain on disposition of revenue equipment	$ (4,971)	$ (13,612)	$ (13,379)
Truckload [Member]
Operating revenue:
Operating revenue	439,792	465,475	500,462
Operating expenses (income):
Operating revenue	439,792	465,475	500,462
Operating income/(loss):
Operating Income	3,283	24,835	59,392
Operating income	3,283	24,835	59,392
Truckload [Member] | Revenue, Net of Fuel Surcharge [Member]
Operating revenue:
Operating revenue	377,452	395,565	411,448
Operating expenses (income):
Operating revenue	377,452	395,565	411,448
Truckload [Member] | Fuel Surcharge Revenue [Member]
Operating revenue:
Operating revenue	62,340	69,910	89,014
Operating expenses (income):
Operating revenue	62,340	69,910	89,014
Truckload [Member] | Operating Segments [Member]
Operating revenue:
Operating revenue	439,792	465,475	500,462
Operating expenses (income):
Operating revenue	439,792	465,475	500,462
Salaries, wages and benefits	185,871	189,010	188,131
Purchased transportation	4,520	4,958	4,835
Fuel and fuel taxes	88,868	98,852	114,306
Supplies and maintenance	39,925	37,495	30,495
Depreciation	64,074	61,644	56,365
Operating taxes and licenses	5,577	5,483	5,037
Operating income/(loss):
Operating taxes and licenses	5,577	5,483	5,037
Operating Income	3,283	24,835	59,392
Insurance and claims	29,693	28,460	25,848
Communications and utilities	5,121	5,064	4,548
Other	15,543	16,368	17,813
Total operating expenses	436,509	440,640	441,070
Operating income	$ 3,283	$ 24,835	$ 59,392
Operating ratio	0.993	0.947	0.881
Operating ratio, net of fuel surcharges	0.991	0.937	0.856
Truckload [Member] | Operating Segments [Member] | Revenue Equipment [Member]
Operating income/(loss):
Gain on disposition of revenue equipment	$ (2,683)	$ (6,694)	$ (6,308)
Dedicated [Member]
Operating revenue:
Operating revenue	319,135	408,272	429,092
Operating expenses (income):
Operating revenue	319,135	408,272	429,092
Operating income/(loss):
Operating Income	23,037	48,377	50,566
Operating income	23,037	48,377	50,566
Dedicated [Member] | Revenue, Net of Fuel Surcharge [Member]
Operating revenue:
Operating revenue	267,077	334,962	336,973
Operating expenses (income):
Operating revenue	267,077	334,962	336,973
Dedicated [Member] | Fuel Surcharge Revenue [Member]
Operating revenue:
Operating revenue	52,058	73,310	92,119
Operating expenses (income):
Operating revenue	52,058	73,310	92,119
Dedicated [Member] | Operating Segments [Member]
Operating revenue:
Operating revenue	319,135	408,272	429,092
Operating expenses (income):
Operating revenue	319,135	408,272	429,092
Salaries, wages and benefits	137,340	165,257	172,179
Purchased transportation	10,568	10,778	9,559
Fuel and fuel taxes	52,925	73,083	91,091
Supplies and maintenance	20,141	26,061	21,268
Depreciation	39,452	46,151	45,630
Operating taxes and licenses	4,066	4,881	4,855
Operating income/(loss):
Operating taxes and licenses	4,066	4,881	4,855
Operating Income	23,037	48,377	50,566
Insurance and claims	21,025	24,503	21,723
Communications and utilities	2,861	3,727	3,471
Other	9,831	11,758	15,136
Total operating expenses	296,098	359,895	378,526
Operating income	$ 23,037	$ 48,377	$ 50,566
Operating ratio	0.928	0.882	0.882
Operating ratio, net of fuel surcharges	0.914	0.856	0.85
Dedicated [Member] | Operating Segments [Member] | Revenue Equipment [Member]
Operating income/(loss):
Gain on disposition of revenue equipment	$ (2,111)	$ (6,304)	$ (6,386)
Intermodal [Member]
Operating revenue:
Operating revenue	58,754	92,078	129,765
Operating expenses (income):
Operating revenue	58,754	92,078	129,765
Operating income/(loss):
Operating Income	(3,922)	(156)	10,639
Operating income	(3,922)	(156)	10,639
Intermodal [Member] | Revenue, Net of Fuel Surcharge [Member]
Operating revenue:
Operating revenue	49,468	75,887	100,452
Operating expenses (income):
Operating revenue	49,468	75,887	100,452
Intermodal [Member] | Fuel Surcharge Revenue [Member]
Operating revenue:
Operating revenue	9,286	16,191	29,313
Operating expenses (income):
Operating revenue	9,286	16,191	29,313
Intermodal [Member] | Operating Segments [Member]
Operating revenue:
Operating revenue	58,754	92,078	129,765
Operating expenses (income):
Operating revenue	58,754	92,078	129,765
Salaries, wages and benefits	11,028	17,666	21,602
Purchased transportation	31,612	47,531	65,271
Fuel and fuel taxes	5,350	8,502	13,174
Supplies and maintenance	3,285	3,826	4,028
Depreciation	6,076	7,071	7,493
Operating taxes and licenses	330	470	516
Operating income/(loss):
Operating taxes and licenses	330	470	516
Operating Income	(3,922)	(156)	10,639
Insurance and claims	1,617	2,341	2,268
Communications and utilities	223	359	412
Other	3,332	5,082	5,047
Total operating expenses	62,676	92,234	119,126
Operating income	$ (3,922)	$ (156)	$ 10,639
Operating ratio	1.067	1.002	0.918
Operating ratio, net of fuel surcharges	1.079	1.002	0.894
Intermodal [Member] | Operating Segments [Member] | Revenue Equipment [Member]
Operating income/(loss):
Gain on disposition of revenue equipment	$ (177)	$ (614)	$ (685)
Brokerage [Member]
Operating revenue:
Operating revenue	146,027	165,630	204,559
Operating expenses (income):
Operating revenue	146,027	165,630	204,559
Operating income/(loss):
Operating Income	10,822	17,054	22,747
Operating income	10,822	17,054	22,747
Brokerage [Member] | Operating Segments [Member]
Operating revenue:
Operating revenue	146,027	165,630	204,559
Operating expenses (income):
Operating revenue	146,027	165,630	204,559
Salaries, wages and benefits	7,493	6,885	8,392
Purchased transportation	122,442	136,067	170,127
Fuel and fuel taxes	0	0	0
Supplies and maintenance	(14)	29	(91)
Depreciation	2,051	1,856	1,526
Operating taxes and licenses	329	219	355
Operating income/(loss):
Operating taxes and licenses	329	219	355
Operating Income	10,822	17,054	22,747
Insurance and claims	774	710	674
Communications and utilities	824	999	746
Other	1,306	1,811	83
Total operating expenses	135,205	148,576	181,812
Operating income	$ 10,822	$ 17,054	$ 22,747
Operating ratio	0.926	0.897	0.889
Operating ratio, net of fuel surcharges	0.926	0.897	0.889
Brokerage [Member] | Operating Segments [Member] | Revenue Equipment [Member]
Operating income/(loss):
Gain on disposition of revenue equipment	$ 0	$ 0	$ 0