| Cover | May 13, 2021 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Document Period End Date | May 13, 2021 |
| Entity Registrant Name | Luminar Technologies, Inc./DE |
| Entity Incorporation, State or Country Code | DE |
| Entity File Number | 001-38791 |
| Entity Tax Identification Number | 83-1804317 |
| Entity Address, Address Line One | 2603 Discovery Drive |
| Entity Address, Address Line Two | Suite 100 |
| Entity Address, City or Town | Orlando |
| Entity Address, State or Province | FL |
| Entity Address, Postal Zip Code | 32826 |
| City Area Code | 407 |
| Local Phone Number | 900-5259 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Class A Common Stock, par value of $0.0001 per share |
| Trading Symbol | LAZR |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | true |
| Entity Ex Transition Period | false |
| Entity Central Index Key | 0001758057 |
| Amendment Flag | false |
