| Document and Entity Information | Jan. 25, 2021 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Jan. 25, 2021 |
| Entity Registrant Name | COVENANT LOGISTICS GROUP, INC. |
| Entity Incorporation, State or Country Code | NV |
| Entity File Number | 000-24960 |
| Entity Tax Identification Number | 88-0320154 |
| Entity Address, Address Line One | 400 Birmingham Hwy |
| Entity Address, City or Town | Chattanooga |
| Entity Address, State or Province | TN |
| Entity Address, Postal Zip Code | 37419 |
| City Area Code | 423 |
| Local Phone Number | 821-1212 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | false |
| Entity Central Index Key | 0000928658 |
| Title of 12(b) Security | $0.01 Par Value Class A common stock |
| Trading Symbol | CVLG |
| Security Exchange Name | NASDAQ |
