Document And Entity Information - shares	9 Months Ended
	Sep. 30, 2021	Oct. 26, 2021
Document Information [Line Items]
Entity Central Index Key	0000095574
Entity Registrant Name	SUPERIOR GROUP OF COMPANIES, INC.
Amendment Flag	true
Current Fiscal Year End Date	--12-31
Document Fiscal Period Focus	Q3
Document Fiscal Year Focus	2021
Document Type	10-Q/A
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2021
Document Transition Report	false
Entity File Number	001-05869
Entity Incorporation, State or Country Code	FL
Entity Tax Identification Number	11-1385670
Entity Address, Address Line One	10055 Seminole Boulevard
Entity Address, City or Town	Seminole
Entity Address, State or Province	FL
Entity Address, Postal Zip Code	33772-2539
City Area Code	727
Local Phone Number	397-9611
Title of 12(b) Security	Common Stock $0.001 par value per share
Trading Symbol	SGC
Security Exchange Name	NASDAQ
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 Common Stock, Shares Outstanding		15,971,211
Amendment Description	Superior Group of Companies, Inc. (the “Company,” “we,” “us” or “our”) is filing this Amendment No. 1 to its Quarterly Report on Form 10-Q for the quarterly period ended September 30, 2021 (the “Amendment” or “Form 10-Q/A”) to amend and restate certain financial information and related footnote and MD&A disclosures in its Quarterly Report on Form 10-Q for the quarterly period ended September 30, 2021 originally filed with the Securities and Exchange Commission (the “SEC”) on November 3, 2021 (the “Existing Quarterly Report” or “original Form 10-Q”). This Amendment also amends the disclosure regarding disclosure controls and procedures and internal control over financial reporting in Item 4 of Part I of the Existing Quarterly Report, amends the disclosure regarding Risk Factors in Item 1A of Part II of the Existing Quarterly Report, and includes as exhibits new certifications required by Sections 302 and 906 of the Sarbanes-Oxley Act of 2002, as amended, from the Company's Chief Executive Officer and Chief Financial Officer dated as of the filing date of this Form 10-Q/A. Item 6 of Part II of the Existing Quarterly Report is amended to reflect the filing of these new certifications.    Background of Restatement   On March 21, 2022, the management and the Audit Committee of the Board of Directors of the Company concluded that, due to a failure to reverse deferred tax liabilities associated with the termination of the Company’s two qualified defined benefit pension plans in the second quarter 2021, the Company's previously issued unaudited interim condensed consolidated financial statements (collectively “financial statements,” and individually “statements of comprehensive income,” “balance sheets,” “statements of shareholders’ equity,” and “statements of cash flows”) as of and for the three and nine months ended September 30, 2021 included in the Existing Quarterly Report should be restated in this Form 10-Q/A. This restatement results in non-cash, non-operating financial statement corrections.   Specifically, management and the Audit Committee concluded that deferred tax liabilities on the Company’s balance sheet related to previous contributions to the pension plans in excess of book expense recognized should have been reversed when the Company recognized the $6.9 million pension termination charge in the second quarter 2021. The impact of this reversal on the Company’s:    •     statement of comprehensive income for the nine months ended September 30, 2021 is an additional tax benefit of approximately $1.8 million, and   •     balance sheet as of September 30, 2021 is an increase in deferred tax assets of approximately $0.4 million and a decrease in deferred tax liabilities of approximately $1.4 million.   With corresponding impacts on the statement of cash flows and statements of shareholders’ equity. Each of these adjustments is a non-cash item.   The financial information that has been previously filed or otherwise reported for this period is superseded by the information in this Form 10-Q/A, and the financial statements and related financial information contained in the Existing Quarterly Report should no longer be relied upon. On March 23, 2022, the Company filed a Current Report on Form 8-K disclosing the non-reliance on the financial statements included in the Existing Quarterly Report.   This Amendment amends and restates Items 1, 2 and 4 of Part I and Items 1A and 6 of Part II of the Existing Quarterly Report, and no other information included in the Existing Quarterly Report is amended hereby. The explanatory caption, if any, at the beginning of each item of this Amendment sets forth the nature of any revisions to that item.   All referenced amounts in this Amendment for prior periods and prior period comparisons reflect the balances and amounts on a restated basis.   Except as described above, no other information included in the Existing Quarterly Report is being amended or updated by this Amendment and this Amendment does not purport to reflect any information or events subsequent to the Existing Quarterly Report.    This Amendment continues to describe the conditions as of the date of the Existing Quarterly Report and, except as expressly contained herein, we have not updated, modified or supplemented the disclosures contained in the Existing Quarterly Report. Accordingly, this Amendment should be read in conjunction with the Existing Quarterly Report and with our filings with the SEC subsequent to the Existing Quarterly Report.   1     Internal Control Considerations   In connection with the restatement, management has reevaluated the effectiveness of the Company’s disclosure controls and procedures and internal control over financial reporting as of September 30, 2021. The Company’s management has concluded that in light of the error described above, a material weakness existed in the Company’s internal control over financial reporting related to accounting for income taxes as of September 30, 2021, and that the Company’s disclosure controls and procedures were not effective as of such date.   Remediation Efforts with Respect to the Material Weakness   The Company’s management, under the oversight of the Audit Committee, is in the process of developing a plan to remediate the material weakness which is expected to include the following measures:   •   implement a tax reporting software solution to streamline our income tax process and enhance our state and federal income tax reporting capabilities;   •   hire additional qualified personnel to bolster the Company's in-house tax capabilities and capacity; and   •   evaluate and, if necessary, enhance the level of precision in the management review controls related to income taxes.   The material weakness will not be considered remediated until management completes the remediation plan above, the enhanced controls operate for a sufficient period of time, and management has concluded, through testing, that the related controls are effective. The Company will monitor the effectiveness of its remediation plan and will refine its remediation plan as appropriate.   For a discussion of management’s consideration of our disclosure controls and procedures, internal control over financial reporting, and the material weakness identified, see Part I, Item 4, “Controls and Procedures” of this Form 10-Q/A.