| Document And Entity Information | Oct. 12, 2021 |
| Document Information [Line Items] | |
| Entity, Registrant Name | Orbital Energy Group, Inc. |
| Document, Type | 8-K |
| Document, Period End Date | Oct. 12, 2021 |
| Entity, File Number | 0-29923 |
| Entity, Incorporation, State or Country Code | CO |
| Entity, Tax Identification Number | 84-1463284 |
| Entity, Address, Address Line One | 1924 Aldine Western |
| Entity, Address, City or Town | Houston |
| Entity, Address, State or Province | TX |
| Entity, Address, Postal Zip Code | 77038 |
| City Area Code | 503 |
| Local Phone Number | 612-2300 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity, Emerging Growth Company | false |
| Title of 12(b) Security | Common stock |
| Trading Symbol | OEG |
| Security Exchange Name | NASDAQ |
| Amendment Flag | false |
| Entity, Central Index Key | 0001108967 |
