Document And Entity Information
 12 Months Ended
Sep. 30, 2013
Nov. 12, 2013
Document Information [Line Items]    
Entity Registrant Name RMG Networks Holding Corp  
Document Type S-1  
Current Fiscal Year End Date --12-31  
Entity Common Stock, Shares Outstanding   11,284,593
Amendment Flag true  
Amendment Description S-1/A  
Entity Central Index Key 0001512074  
Entity Current Reporting Status Yes  
Entity Voluntary Filers No  
Entity Filer Category Smaller Reporting Company  
Entity Well-known Seasoned Issuer No  
Document Period End Date Sep. 30, 2013  
Document Fiscal Year Focus 2013  
Document Fiscal Period Focus FY  
Symon Holdings Corporation [Member]
    
Document Information [Line Items]    
Entity Registrant Name Symon Holdings Corp  
Current Fiscal Year End Date --01-31  
Entity Central Index Key 0001342461  
Entity Filer Category Smaller Reporting Company