XML 13 R1.htm IDEA: XBRL DOCUMENT v3.20.1
Document and Entity Information - shares
 9 Months Ended
Sep. 30, 2018
May 17, 2020
Cover [Abstract]    
Entity Registrant Name theMaven, Inc.  
Entity Central Index Key 0000894871  
Document Type 10-Q  
Document Period End Date Sep. 30, 2018  
Amendment Flag false  
Current Fiscal Year End Date --12-31  
Entity Current Reporting Status No  
Entity Interactive Data Current No  
Entity Filer Category Non-accelerated Filer  
Entity Small Business Flag true  
Entity Emerging Growth Company false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   39,078,503
Document Fiscal Period Focus Q3  
Document Fiscal Year Focus 2018