Note 10 - Equity Method Investment - TEL's Summarized Financial Information 2 (Details) - Transport Enterprise Leasing LLC [Member] - USD ($) $ in Thousands |
Jun. 30, 2026 |
Dec. 31, 2025 |
|---|---|---|
| Location, Statement of Financial Position, Balance [Axis]: cvti:DriversAdvancesAndOtherReceivablesNetOfAllowance | ||
| Accounts receivable from TEL | $ 9 | $ 13 |
| Location, Statement of Financial Position, Balance [Axis]: us-gaap:AccruedLiabilitiesCurrent | ||
| Accounts payable to TEL | 231 | 460 |
| Location, Statement of Financial Position, Balance [Axis]: us-gaap:OtherAssetsNoncurrent | ||
| Investment in TEL | $ 94,506 | $ 85,512 |
| X | ||||||||||
- Definition Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
|
| X | ||||||||||
- Definition Amount, after allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business. Reference 1: http://www.xbrl.org/2003/role/exampleRef
|
| X | ||||||||||
- Definition This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|