Annual report pursuant to Section 13 and 15(d)

Document and Entity Information

v3.19.1
Document and Entity Information - USD ($)
12 Months Ended
Dec. 31, 2018
Apr. 12, 2019
Jun. 29, 2018
Document and Entity Information [Abstract]      
Document Type 10-K    
Amendment Flag false    
Document Period End Date Dec. 31, 2018    
Document Fiscal Year Focus 2018    
Document Fiscal Period Focus FY    
Entity Registrant Name Limbach Holdings, Inc.    
Entity Central Index Key 0001606163    
Current Fiscal Year End Date --12-31    
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Filer Category Non-accelerated Filer    
Entity Public Float     $ 57,684,969
Trading Symbol LMB    
Entity Common Stock, Shares Outstanding   7,643,133  
Entity Shell Company false    
Entity Emerging Growth Company true    
Entity Ex Transition Period false    
Entity Small Business true