Document and Entity Information
12 Months Ended
Dec. 31, 2017
Document And Entity Information [Abstract]  
Entity Registrant Name Spark Networks SE
Entity Central Index Key 0001705338
Trading Symbol lov
Entity Current Reporting Status Yes
Entity Filer Category Non-accelerated Filer
Current Fiscal Year End Date --12-31
Entity Well-known Seasoned Issuer No
Entity Common Stock, Shares Outstanding 1,293,219
Document Type 20-F
Document Period End Date Dec. 31, 2017
Amendment Flag false
Document Fiscal Year Focus 2017
Document Fiscal Period Focus FY