Quarterly report pursuant to Section 13 or 15(d)

Cover

v3.21.2
Cover - shares
6 Months Ended
Jun. 30, 2021
Aug. 11, 2021
Cover [Abstract]    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Jun. 30, 2021  
Document Transition Report false  
Entity File Number 001-36541  
Entity Registrant Name LIMBACH HOLDINGS, INC.  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 46-5399422  
Entity Address, Address Line One 1251 Waterfront Place  
Entity Address, Address Line Two Suite 201  
Entity Address, City or Town Pittsburgh  
Entity Address, State or Province PA  
Entity Address, Postal Zip Code 15222  
City Area Code 412  
Local Phone Number 359-2100  
Title of 12(b) Security Common Stock, par value $0.0001 per share  
Trading Symbol LMB  
Security Exchange Name NASDAQ  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Non-accelerated Filer  
Entity Small Business true  
Entity Emerging Growth Company false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   10,267,841
Amendment Flag false  
Document Fiscal Year Focus 2021  
Document Fiscal Period Focus Q2  
Entity Central Index Key 0001606163  
Current Fiscal Year End Date --12-31