v3.26.1
Cover - shares
 3 Months Ended
Mar. 31, 2026
May 04, 2026
Document Information [Line Items]    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Mar. 31, 2026  
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 5102 W Laurel Street  
Entity Address, Address Line Two Suite 700  
Entity Address, City or Town Tampa  
Entity Address, State or Province FL  
Entity Address, Postal Zip Code 33607  
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 Large Accelerated Filer  
Entity Small Business false  
Entity Emerging Growth Company false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   11,921,067
Amendment Flag false  
Document Fiscal Year Focus 2026  
Document Fiscal Period Focus Q1  
Entity Central Index Key 0001606163  
Current Fiscal Year End Date --12-31  
Former Address    
Document Information [Line Items]    
Entity Address, Address Line One 797 Commonwealth Drive  
Entity Address, City or Town Warrendale  
Entity Address, State or Province PA  
Entity Address, Postal Zip Code 15086