Document And Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2020	Mar. 02, 2021	Jun. 30, 2020
Document Information [Line Items]
Entity Central Index Key	0000928658
Entity Registrant Name	COVENANT LOGISTICS GROUP, INC.
Amendment Flag	true
Current Fiscal Year End Date	--12-31
Document Fiscal Period Focus	FY
Document Fiscal Year Focus	2020
Document Type	10-K/A
Document Annual Report	true
Document Period End Date	Dec. 31, 2020
Document Transition Report	false
Entity File Number	0-24960
Entity Incorporation, State or Country Code	NV
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
Title of 12(b) Security	$0.01 Par Value Class A common stock
Trading Symbol	CVLG
Security Exchange Name	NASDAQ
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Public Float			$ 137,000,000.0
Amendment Description	Covenant Logistics Group, Inc. (the “Company”) files this Amendment No. 1 (“Amendment No. 1”) to its Annual Report on Form 10-K filed on March 5, 2021 for the fiscal year ended December 31, 2020 (the “Original 10-K”) to provide an amended report of KPMG LLP (KPMG), its previous independent registered public accounting firm, that includes a statement inadvertently omitted from the previously filed version that confirms KPMG did not audit the financial statements of Transport Enterprise Leasing, LLC (“TEL”) in 2019. In addition, this Amendment No. 1 includes as exhibits: (i) the TEL financial statements as of and for the years ended December 31, 2019 and 2018 and for the year ended December 31, 2017, (ii) consents of Coulter & Justus, P.C. related to the TEL financial statements, (iii) a new consent of KPMG, and (iv) in accordance with Rule 12b-15 under the Securities Exchange Act of 1934, as amended, new certifications from the Company’s Principal Executive Officer and Principal Financial Officer dated as of the date of filing of this Amendment No. 1.   This Amendment No. 1 consists solely of the preceding cover page, this explanatory note, Part II., Item 8., “Financial Statements and Supplementary Data,” in its entirety, Part IV., Item 15., “Exhibits and Financial Statement Schedules,” in its entirety, and the signature page. The consolidated financial statements and notes to consolidated financial statements have remained the same as that previously filed in the Original 10-K.   This Amendment No. 1 speaks as of the date of the Original 10-K, does not reflect events that may have occurred after the date of the Original 10-K and does not modify or update in any way the disclosures made in the Original 10-K, except as described above. This Amendment No. 1 should be read in conjunction with the Original 10-K and with the Company’s subsequent filings with the SEC.
Common Class B [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		2,350,000
Common Class A [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		14,450,002