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Cover
 3 Months Ended
Mar. 31, 2021
shares
Cover [Abstract]  
Document Type 10-Q
Amendment Flag false
Document Quarterly Report true
Document Transition Report false
Document Period End Date Mar. 31, 2021
Document Fiscal Period Focus Q1
Document Fiscal Year Focus 2021
Current Fiscal Year End Date --12-31
Entity File Number 000-51372
Entity Registrant Name Omega Flex, Inc.
Entity Central Index Key 0001317945
Entity Tax Identification Number 23-1948942
Entity Incorporation, State or Country Code PA
Entity Address, Address Line One 451 Creamery Way
Entity Address, City or Town Exton
Entity Address, State or Province PA
Entity Address, Postal Zip Code 19341
City Area Code (610)
Local Phone Number 524-7272
Title of 12(b) Security Common Stock, par value $0.01 per share
Trading Symbol OFLX
Security Exchange Name NASDAQ
Entity Current Reporting Status Yes
Entity Interactive Data Current Yes
Entity Filer Category Accelerated Filer
Entity Small Business false
Entity Emerging Growth Company false
Entity Shell Company false
Entity Common Stock, Shares Outstanding 10,094,322