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Document and Entity Information - USD ($)
 12 Months Ended
Mar. 31, 2020
Jun. 26, 2020
Sep. 30, 2019
Cover [Abstract]      
Document Type 10-K    
Amendment Flag false    
Document Period End Date Mar. 31, 2020    
Document Fiscal Year Focus 2020    
Document Fiscal Period Focus FY    
Trading Symbol MSN    
Entity Registrant Name EMERSON RADIO CORP    
Entity Central Index Key 0000032621    
Current Fiscal Year End Date --03-31    
Entity Well-known Seasoned Issuer No    
Entity Current Reporting Status Yes    
Entity Voluntary Filers No    
Entity Filer Category Non-accelerated Filer    
Entity Shell Company false    
Entity Small Business true    
Entity Emerging Growth Company false    
Entity Common Stock, Shares Outstanding   21,042,652  
Entity Public Float     $ 5,729,777
Entity File Number 001-07731    
Entity Tax Identification Number 22-3285224    
Entity Address, Address Line One 35 Waterview Blvd    
Entity Address, Address Line Two Suite 140    
Entity Address, City or Town Parsippany    
Entity Address, State or Province NJ    
Entity Address, Postal Zip Code 07054    
City Area Code 973    
Local Phone Number 428-2000    
Entity Incorporation, State or Country Code DE    
Entity Interactive Data Current Yes    
Title of 12(b) Security Common Stock, par value $.01 per share    
Security Exchange Name NYSEAMER    
Document Annual Report true    
Document Transition Report false    
Documents Incorporated by Reference

Document Part of the Form 10-K Proxy Statement for Annual Meeting of Stockholders for the fiscal year ended March 31, 2020, or an amendment to this Annual Report on Form 10-K Part III