Note 6 - Debt - Current and Long-term Debt (Details) - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024
Debt, current	$ 51,159	$ 64,210
Debt, noncurrent	214,101	187,085
Principal portion of finance lease obligations, secured by related revenue equipment, current	1,032	751
Principal portion of finance lease obligations, secured by related revenue equipment, noncurrent	2,546	3,192
Principal portion of operating lease obligations, secured by related real estate and revenue equipment	10,796	10,349
Principal portion of operating lease obligations, secured by related real estate and revenue equipment	29,188	31,302
Total debt and lease obligations	62,987	75,310
Total debt and lease obligations	245,835	221,579
Finance Lease Secured by Related Revenue Equipment [Member]
Principal portion of finance lease obligations, secured by related revenue equipment, current	1,032	751
Principal portion of finance lease obligations, secured by related revenue equipment, noncurrent	2,546	3,192
Principal portion of operating lease obligations, secured by related real estate and revenue equipment	10,796	10,349
Principal portion of operating lease obligations, secured by related real estate and revenue equipment	29,188	31,302
Draw Note [Member]
Credit facility, current	0	0
Credit facility, noncurrent	0	0
Revenue Equipment Installment Notes [Member]
Debt, current	49,780	62,860
Debt, noncurrent	173,784	170,629
Real Estate Note [Member]
Debt, current	1,379	1,350
Debt, noncurrent	15,760	16,456
Revolving Credit Facility [Member]
Credit facility, current	0	0
Credit facility, noncurrent	$ 24,557	$ 0

Present value of lessee's discounted obligation for lease payments from finance lease, classified as current.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 842
-SubTopic 20
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The carrying value as of the balance sheet date of the current portion of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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The carrying value as of the balance sheet date of the noncurrent portion of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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