XML 11 R1.htm IDEA: XBRL DOCUMENT v3.5.0.2
Document and Entity Information - shares
9 Months Ended
Sep. 30, 2016
Oct. 21, 2016
Document and Entity Information [Abstract]    
Entity Registrant Name MARINE PRODUCTS CORP  
Entity Central Index Key 0001129155  
Trading Symbol mpx  
Current Fiscal Year End Date --12-31  
Entity Filer Category Accelerated Filer  
Entity Common Stock, Shares Outstanding   38,355,421
Document Type 10-Q  
Document Period End Date Sep. 30, 2016  
Amendment Flag false  
Document Fiscal Year Focus 2016  
Document Fiscal Period Focus Q3