| Cover Cover | Apr. 20, 2021 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Document Period End Date | Apr. 20, 2021 |
| Entity Registrant Name | WORKHORSE GROUP INC. |
| Entity Incorporation, State or Country Code | NV |
| Entity File Number | 001-37673 |
| Entity Tax Identification Number | 26-1394771 |
| Entity Address, Address Line One | 100 Commerce Drive |
| Entity Address, City or Town | Loveland |
| Entity Address, State or Province | OH |
| Entity Address, Postal Zip Code | 45140 |
| City Area Code | (513) |
| Local Phone Number | 360-4704 |
| 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, $0.001 par value per share |
| Trading Symbol | WKHS |
| Entity Central Index Key | 0001425287 |
| Amendment Flag | false |
