COVER PAGE - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Jan. 29, 2021	Jun. 30, 2020
Cover [Abstract]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2020
Document Transition Report	false
Entity File Number	001-33584
Entity Registrant Name	DHI Group, Inc.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	20-3179218
Entity Address, Address Line Two	Suite 400
Entity Address, Address Line One	6465 South Greenwood Plaza
Entity Address, City or Town	Centennial
Entity Address, State or Province	CO
Entity Address, Postal Zip Code	80111
City Area Code	212
Local Phone Number	448-6605
Title of 12(b) Security	Common Stock, par value $0.01 per share
Trading Symbol	DHX
Security Exchange Name	NYSE
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
ICFR Auditor Attestation Flag	true
Entity Shell Company	false
Entity Public Float			$ 101
Entity Common Stock, Shares Outstanding		52,240,161
Entity Central Index Key	0001393883
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	FY
Amendment Flag	false