v3.25.2
Cover
Aug. 06, 2025
May 01, 2024
Cover [Abstract]    
Document Type 8-K  
Document Period End Date Aug. 06, 2025  
Entity Registrant Name DLH Holdings Corp.  
Entity Incorporation, State or Country Code NJ  
Entity File Number 0-18492  
Entity Tax Identification Number 22-1899798  
Entity Address, Address Line One 3565 Piedmont Road, NE  
Entity Address, Address Line Two Building 3  
Entity Address, Address Line Three Suite 700  
Entity Address, City or Town Atlanta  
Entity Address, State or Province GA  
Entity Address, Postal Zip Code 30305  
City Area Code 770  
Local Phone Number 554-3545  
Title of 12(b) Security Common Stock  
Trading Symbol DLHC  
Security Exchange Name NASDAQ  
Written Communications false  
Soliciting Material false  
Pre-commencement Tender Offer false  
Pre-commencement Issuer Tender Offer false  
Entity Emerging Growth Company   false
Entity Central Index Key 0000785557  
Amendment Flag false