| Document and Entity Information | Oct. 18, 2021 |
| Document Information [Line Items] | |
| Amendment Flag | false |
| Entity Central Index Key | 0001822928 |
| Document Type | 8-K |
| Document Period End Date | Oct. 18, 2021 |
| Entity Registrant Name | HOLLEY INC. |
| Entity Incorporation, State or Country Code | DE |
| Entity File Number | 001-39599 |
| Entity Tax Identification Number | 87-1727560 |
| Entity Address, Address Line One | 1801 Russelville Road |
| Entity Address, City or Town | Bowling Green |
| Entity Address, State or Province | KY |
| Entity Address, Postal Zip Code | 42101 |
| City Area Code | 270 |
| Local Phone Number | 495-4801 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | true |
| Entity Ex Transition Period | false |
| Common Stock [Member] | |
| Document Information [Line Items] | |
| Title of 12(b) Security | Common stock, par value $0.0001 per share |
| Trading Symbol | HLLY |
| Security Exchange Name | NYSE |
| Warrant [Member] | |
| Document Information [Line Items] | |
| Title of 12(b) Security | Warrants, each exercisable for one share of common stock at an exercise price of $11.50 per share |
| Trading Symbol | HLLY WS |
| Security Exchange Name | NYSE |
