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Note 7 - Debt (Details Textual) - USD ($) $ in Thousands |  | 3 Months Ended | 9 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | ---
Oct. 23, 2020 | Mar. 31, 2024 | Mar. 31, 2023 | Sep. 30, 2022 | Dec. 31, 2023 | Sep. 30, 2020 | Aug. 31, 2015
Letters of Credit Outstanding, Amount |  | $ 21,000 |  |  | $ 21,800 |  |
Interest Rate Swap [Member] |  |  |  |  |  |  |
Derivative, Fixed Interest Rate |  |  |  |  |  |  | 4.20%
Variable Rate Note [Member] |  |  |  |  |  |  |
Debt Instrument, Face Amount |  |  |  |  |  |  | $ 28,000
Lenders [Member] |  |  |  |  |  |  |
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage | 0.25% |  |  |  |  |  |
Percent of Eligible Accounts Receivable | 87.50% |  |  |  |  |  |
Percent of Appraised Net Orderly Liquidation, Value of Eligible Revenue Equipment | 85.00% |  |  |  |  |  |
Percent of Net Book Value of Eligible Revenue Equipment | 100.00% |  |  |  |  |  |
Line of Credit Facility, Availability as Percentage of Revolver Commitment | 60.00% |  |  |  |  |  |
Line of Credit Facility, Revolver Commitment, Amount | $ 65,000 |  |  |  |  |  |
Long-Term Line of Credit |  | 0 |  |  |  |  |
Letters of Credit Outstanding, Amount |  | 21,000 |  |  |  |  |
Line of Credit Facility, Remaining Borrowing Capacity |  | 89,000 |  |  |  |  |
Fixed Charge Coverage Requirement |  | 0 | $ 0 |  |  |  |
Debt, Secured with a Cross Default Feature |  | 35,900 |  |  |  |  |
Lenders [Member] | Federal Funds Rate [Member] | Base Rate Loans [Member] |  |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate |  |  |  | 0.50% |  |  |
Lenders [Member] | Applicable Margin [Member] | Base Rate Loans [Member] | Minimum [Member] |  |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate | 0.25% |  |  |  |  |  |
Lenders [Member] | Applicable Margin [Member] | Base Rate Loans [Member] | Maximum [Member] |  |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate | 0.75% |  |  |  |  |  |
Lenders [Member] | Applicable Margin [Member] | Secured Overnight Financing Rate (SOFR) Loans [Member] | Minimum [Member] |  |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate | 1.25% |  |  |  |  |  |
Lenders [Member] | Applicable Margin [Member] | Secured Overnight Financing Rate (SOFR) Loans [Member] | Maximum [Member] |  |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate | 1.75% |  |  |  |  |  |
Lenders [Member] | Revolving Credit Facility [Member] |  |  |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity | $ 110,000 |  |  |  |  |  |
Line of Credit Facility, Maximum Increase in Borrowing Capacity | 75,000 |  |  |  |  |  |
Lenders [Member] | Revolving Credit Facility [Member] | Base Rate Loans [Member] |  |  |  |  |  |  |
Long-Term Line of Credit |  | 0 |  |  |  |  |
Lenders [Member] | Revolving Credit Facility [Member] | Secured Overnight Financing Rate (SOFR) Loans [Member] |  |  |  |  |  |  |
Long-Term Line of Credit |  | $ 0 |  |  |  |  |
Lenders [Member] | Letter of Credit [Member] |  |  |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity | 105,000 |  |  |  |  |  |
Line of Credit Facility, Borrowing Capacity, Percentage of Aggregate Commitments | $ 10,000 |  |  |  |  |  |
Lenders [Member] | Swing Line Sub Facility [Member] |  |  |  |  |  |  |
Percent of Aggregate Commitments under Credit Facility | 10.00% |  |  |  |  |  |
TBK Bank [Member] | Draw Note [Member] |  |  |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity |  |  |  |  |  | $ 45,000 |

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- Definition Debt secured with a cross default feature. + References No definition available. + Details
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- Definition Represents the fixed charge coverage requirement. + References No definition available. + Details
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- Definition The availability of line of credit facility as percentage of the revolver commitment. + References No definition available. + Details
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- Definition Represents percentage of aggregate commitments as borrowing capacity. + References No definition available. + Details
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- Definition Line of credit facility's maximum increase in borrowing capacity as long as no event of default exists. + References No definition available. + Details
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- Definition The revolver commitment amount. + References No definition available. + Details
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- Definition The percent of the lenders' aggregate commitments under the credit facility. + References No definition available. + Details
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- Definition The percent of appraised net orderly liquidation value of eligible revenue equipment used in the calculation of borrowing base. + References No definition available. + Details
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- Definition Percent of the eligible accounts receivable used in the calculation of borrowing base. + References No definition available. + Details
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- Definition Percent of net book value of eligible revenue equipment used in the calculation of borrowing base. + References No definition available. + Details
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- Definition Percentage points added to the reference rate to compute the variable rate on the debt instrument. + References No definition available. + Details
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- Definition Face (par) amount of debt instrument at time of issuance. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 835 -SubTopic 30 -Name Accounting Standards Codification -Section 55 -Paragraph 8 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482949/835-30-55-8 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1B Reference 3: http://www.xbrl.org/2003/role/exampleRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 69B -Publisher FASB -URI https://asc.fasb.org/1943274/2147481568/470-20-55-69B Reference 4: http://www.xbrl.org/2003/role/exampleRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 69C -Publisher FASB -URI https://asc.fasb.org/1943274/2147481568/470-20-55-69C Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 835 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482900/835-30-50-1 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 835 -SubTopic 30 -Name Accounting Standards Codification -Section 45 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482925/835-30-45-2 + Details
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- Definition The total amount of the contingent obligation under letters of credit outstanding as of the reporting date. + References No definition available. + Details
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- Definition The carrying value as of the balance sheet date of the current and noncurrent portions 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. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -SubTopic 10 -Topic 210 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 942 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478546/942-210-S99-1 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 944 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(16)(a)(2)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478777/944-210-S99-1 + Details
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- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)(b)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(19)(b)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 + Details
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- Definition Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481544/470-10-50-6 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)(b)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(19)(b)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 + Details
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- Definition The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility. + References No definition available. + Details
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