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Document And Entity Information - USD ($)
 12 Months Ended
Dec. 31, 2020
Mar. 30, 2021
Jun. 30, 2020
Cover [Abstract]      
Entity Registrant Name LifeMD, Inc.    
Entity Central Index Key 0000948320    
Document Type 10-K    
Document Period End Date Dec. 31, 2020    
Amendment Flag false    
Current Fiscal Year End Date --12-31    
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Reporting Status Current Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Non-accelerated Filer    
Entity Small Business Flag true    
Entity Emerging Growth Company false    
Entity Shell Company false    
ICFR Auditor Attestation Flag false    
Entity Public Float     $ 82,837,083
Entity Common Stock, Shares Outstanding   25,906,754  
Document Fiscal Period Focus FY    
Document Fiscal Year Focus 2020