| Document and Entity Information | Sep. 08, 2021 |
| Document and Entity Information [Abstract] | |
| Document Type | 8-K |
| 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, 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 |
| Entity Address, Address Line One | 6465 South Greenwood Plaza |
| Document Information [Line Items] | |
| Entity Central Index Key | 0001393883 |
| Document Type | 8-K |
| Document Fiscal Year Focus | 2021 |
| Document Fiscal Period Focus | FY |
| Amendment Flag | false |
| Entity Address, Postal Zip Code | 80111 |
| Entity Address, Address Line Two | Suite 400 |
| Entity Address, City or Town | Centennial |
| Entity Address, State or Province | CO |
| Document Period End Date | Sep. 8, 2021 |
| Entity Emerging Growth Company | false |
| Pre-commencement Issuer Tender Offer | false |
| Pre-commencement Tender Offer | false |
| Soliciting Material | false |
| Written Communications | false |
