Annual report pursuant to Section 13 and 15(d)

Document and Entity Information

v3.19.1
Document and Entity Information - USD ($)
 12 Months Ended
Dec. 31, 2018
Mar. 05, 2019
Jun. 30, 2018
Document Information [Line Items]      
Document Type 10-K    
Amendment Flag false    
Document Period End Date Dec. 31, 2018    
Document Fiscal Year Focus 2018    
Document Fiscal Period Focus FY    
Trading Symbol SALM    
Entity Registrant Name SALEM MEDIA GROUP, INC. /DE/    
Entity Central Index Key 0001050606    
Current Fiscal Year End Date --12-31    
Entity Well-known Seasoned Issuer No    
Entity Current Reporting Status Yes    
Entity Voluntary Filers No    
Entity Filer Category Accelerated Filer    
Entity Shell Company false    
Entity Small Business true    
Entity Emerging Growth Company false    
Entity Public Float     $ 57,213,462
Common Class A [Member]      
Document Information [Line Items]      
Entity Common Stock, Shares Outstanding   20,632,416  
Common Class B [Member]      
Document Information [Line Items]      
Entity Common Stock, Shares Outstanding   5,553,696