XML 10 R1.htm IDEA: XBRL DOCUMENT v3.19.1
Document and Entity Information - shares
 3 Months Ended
Mar. 31, 2019
May 08, 2019
Document Information [Line Items]    
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Mar. 31, 2019  
Document Fiscal Year Focus 2019  
Document Fiscal Period Focus Q1  
Trading Symbol MCHX  
Entity Registrant Name MARCHEX INC  
Entity Central Index Key 0001224133  
Current Fiscal Year End Date --12-31  
Entity Filer Category Accelerated Filer  
Entity Small Business true  
Entity Emerging Growth Company false  
Class A    
Document Information [Line Items]    
Entity Common Stock, Shares Outstanding   4,660,927
Class B    
Document Information [Line Items]    
Entity Common Stock, Shares Outstanding   37,695,024