| Document and Entity Information | Aug. 06, 2020 | Jun. 30, 2020 | Jun. 30, 2020 |
| Document and Entity Information [Abstract] | |||
| Document Type | 8-K | ||
| Document Period End Date | Aug. 6, 2020 | ||
| Entity Registrant Name | DHI Group, Inc. | ||
| Entity Incorporation, State or Country Code | DE | ||
| Entity Address, Postal Zip Code | 80111 | ||
| City Area Code | 212 | ||
| Local Phone Number | 448-6605 | ||
| Entity Address, Address Line One | 6465 South Greenwood Plaza | ||
| Entity Address, City or Town | Centennial | ||
| Entity Address, Address Line Two | Suite 400 | ||
| Written Communications | false | ||
| Soliciting Material | false | ||
| Pre-commencement Tender Offer | false | ||
| Pre-commencement Issuer Tender Offer | false | ||
| Title of 12(b) Security | Common Stock, par value $0.01 per share | ||
| Trading Symbol | DHX | ||
| Security Exchange Name | NYSE | ||
| Entity Emerging Growth Company | false | ||
| Entity File Number | 001-33584 | ||
| Entity Tax Identification Number | 20-3179218 | ||
| Document Information [Line Items] | |||
| Entity Central Index Key | 0001393883 | ||
| Document Type | 8-K | ||
| Document Fiscal Year Focus | 2020 | ||
| Document Fiscal Period Focus | Q2 | ||
| Amendment Flag | false | ||
| Entity Address, Postal Zip Code | 80111 | ||
| Entity Address, Address Line One | 6465 South Greenwood Plaza | ||
| Entity Address, Address Line Two | Suite 400 | ||
| Entity Address, City or Town | Centennial | ||
| Entity Address, State or Province | CO | ||
| Document Period End Date | Aug. 6, 2020 | ||
| Entity Emerging Growth Company | false | ||
| Pre-commencement Issuer Tender Offer | false | ||
| Pre-commencement Tender Offer | false | ||
| Soliciting Material | false | ||
| Written Communications | false | ||
| Former Address [Member] | |||
| Document and Entity Information [Abstract] | |||
| Entity Address, Postal Zip Code | 10018 | ||
| Entity Address, Address Line One | 1450 Broadway | ||
| Entity Address, City or Town | New York | ||
| Entity Address, Address Line Two | 29th Floor, | ||
| Document Information [Line Items] | |||
| Entity Address, Postal Zip Code | 10018 | ||
| Entity Address, Address Line One | 1450 Broadway | ||
| Entity Address, Address Line Two | 29th Floor, | ||
| Entity Address, City or Town | New York | ||
| Entity Address, State or Province | NY |
