Note 7 - Debt - Current and Long-term Debt (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Debt, current	$ 60,964	$ 47,651
Debt, noncurrent	187,400	196,894
Principal portion of finance lease obligations, secured by related revenue equipment, current	922	781
Principal portion of finance lease obligations, secured by related revenue equipment, noncurrent	5,802	5,296
Principal portion of operating lease obligations, secured by related real estate and revenue equipment	8,959	11,950
Principal portion of operating lease obligations, secured by related real estate and revenue equipment	27,328	30,892
Total debt and lease obligations	70,845	60,382
Total debt and lease obligations	220,530	233,082
Finance Lease Secured by Related Revenue Equipment [Member]
Principal portion of finance lease obligations, secured by related revenue equipment, current	922	781
Principal portion of finance lease obligations, secured by related revenue equipment, noncurrent	5,802	5,296
Operating Lease Secured By Related Equipment [Member]
Principal portion of operating lease obligations, secured by related real estate and revenue equipment	8,959	11,950
Principal portion of operating lease obligations, secured by related real estate and revenue equipment	27,328	30,892
Draw Note [Member]
Credit facility, current	0	0
Credit facility, noncurrent	0	0
Revenue Equipment Installment Notes [Member]
Debt, current	59,656	46,357
Debt, noncurrent	169,926	167,509
Real Estate Note [Member]
Debt, current	1,308	1,294
Debt, noncurrent	17,474	17,806
Revolving Credit Facility [Member]
Credit facility, current	0	0
Credit facility, noncurrent	$ 0	$ 11,579

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
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-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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