v3.25.1
Document And Entity Information - USD ($)
 12 Months Ended
Mar. 31, 2025
Jun. 12, 2025
Sep. 30, 2024
Document Information [Line Items]      
Entity Central Index Key 0000039092    
Entity Registrant Name FRIEDMAN INDUSTRIES, INCORPORATED    
Amendment Flag false    
Current Fiscal Year End Date --03-31    
Document Fiscal Period Focus FY    
Document Fiscal Year Focus 2025    
Document Type 10-K    
Document Annual Report true    
Document Period End Date Mar. 31, 2025    
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 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    
ICFR Auditor Attestation Flag true    
Document Financial Statement Error Correction [Flag] false    
Entity Shell Company false    
Entity Public Float     $ 103,300,000
Entity Common Stock, Shares Outstanding   7,059,440  
Auditor Name Moss Adams LLP    
Auditor Location Houston, Texas    
Auditor Firm ID 659