Document And Entity Information - USD ($) $ in Millions	12 Months Ended
	Mar. 31, 2024	Jan. 23, 2025	Sep. 29, 2023
Document Information [Line Items]
Entity, Registrant Name	FRIEDMAN INDUSTRIES, INCORPORATED
Current Fiscal Year End Date	--03-31
Document, Fiscal Period Focus	FY
Document, Fiscal Year Focus	2024
Document, Type	10-K/A
Document, Annual Report	true
Document, Period End Date	Mar. 31, 2024
Document, Transition Report	false
Entity, File Number	1-7521
Entity, Incorporation, State or Country Code	TX
Entity, Tax Identification Number	74-1504405
Entity, Address, Address Line One	1121 Judson Road Suite 124
Entity, Address, City or Town	Longview
Entity, Address, State or Province	TX
Entity, Address, Postal Zip Code	75601
City Area Code	903
Local Phone Number	758-3431
Title of 12(b) Security	Common Stock, $1 Par Value
Trading Symbol	FRD
Security Exchange Name	NYSE
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
ICFR Auditor Attestation Flag	true
Document, Financial Statement Error Correction Flag	false
Entity, Shell Company	false
Entity, Public Float			$ 92
Entity, Common Stock Shares, Outstanding		6,970,536
Amendment Description	This Amendment No. 1 on Form 10-K/A (this “Amendment”) to the Annual Report on Form 10-K of Friedman Industries, Incorporated (the “Company”, “we”, “us” or “our”) for the fiscal year ended March 31, 2024, originally filed with the U.S. Securities and Exchange Commission (the “SEC”) on June 11, 2024 (the “Annual Report”) is being filed to amend the information with respect to Part II, Item 9A: Controls and Procedures, to correct such information to (1) include a section entitled “Evaluation of Disclosure Controls and Procedures,” and (2) to amend and restate the section entitled “Management’s Report on Internal Control Over Financial Reports” to properly disclose the changes that occurred during the quarter ended March 31, 2024.   The section entitled “Evaluation of Disclosure Controls and Procedures” is being included in this Amendment because it is a required disclosure that was not disclosed in the Annual Report. If initially included in the Annual Report, such section would have stated management’s conclusion that the Company’s disclosure controls and procedures were effective at March 31, 2024. However, since such section was not initially disclosed, this Amendment is amending the Annual Report to state management’s conclusion that the Company’s disclosure controls and procedures were not effective as of March 31, 2024. The Company will implement process improvements to its disclosure controls and procedures to ensure that all required disclosures are included in the Company’s periodic filings.   As required by Rule 12b-15 under the Securities Exchange Act of 1934, as amended (the “Exchange Act”), the certifications required by Rule 13a-14(a) under the Exchange Act are also being filed as exhibits to this Amendment. This Amendment contains only the cover page, this explanatory note, the complete text of Item 9A, the exhibit list, a signature page and the revised certifications.   Other than as expressly set forth herein, this Amendment does not, and does not purport to, amend, update or restate the information in the Annual Report or reflect any events that have occurred after the Annual Report was initially filed. Information not affected by this Amendment remains unchanged and reflects the disclosures made at the time as of which the Annual Report was initially filed. This Amendment should be read together with the Annual Report and the Company’s other filings with the SEC.
Amendment Flag	true
Entity, Central Index Key	0000039092