Document And Entity Information (USD $)
 12 Months Ended
Dec. 31, 2014
Nov. 14, 2014
Document Information [Line Items]    
Entity Registrant Name RMG Networks Holding Corp  
Document Type 10-K  
Current Fiscal Year End Date --12-31  
Entity Common Stock, Shares Outstanding   12,167,756
Entity Public Float   $ 16,800,000
Amendment Flag false  
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 Dec. 31, 2014  
Document Fiscal Year Focus 2014  
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