| Cover | Sep. 21, 2021 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Sep. 21, 2021 |
| Entity File Number | 001-37673 |
| Entity Registrant Name | WORKHORSE GROUP INC. |
| Entity Central Index Key | 0001425287 |
| Entity Tax Identification Number | 26-1394771 |
| Entity Incorporation, State or Country Code | NV |
| 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 |
| Title of 12(b) Security | Common Stock, par value $0.001 per share |
| Trading Symbol | WKHS |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | false |
