XML 41 R1.htm IDEA: XBRL DOCUMENT v3.20.1
Document and Entity Information - USD ($)
 12 Months Ended
Dec. 31, 2019
Mar. 12, 2020
Jun. 28, 2019
Entity Information [Line Items]      
Entity Small Business true    
Entity Registrant Name CORE MOLDING TECHNOLOGIES INC.    
Entity Central Index Key 0001026655    
Document Type 10-K    
Document Period End Date Dec. 31, 2019    
Amendment Flag false    
Document Fiscal Year Focus 2019    
Document Fiscal Period Focus FY    
Current Fiscal Year End Date --12-31    
Entity Well-known Seasoned Issuer No    
Entity Interactive Data Current Yes    
Entity Voluntary Filers No    
Entity Emerging Growth Company false    
Entity Shell Company false    
Entity Filer Category Non-accelerated Filer    
Entity Public Float     $ 44,201,708
Entity Common Stock, Shares Outstanding   8,221,864