| Cover | Dec. 27, 2022 |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Dec. 27, 2022 |
| Entity File Number | 001-39869 |
| Entity Registrant Name | LightJump Acquisition Corporation |
| Entity Central Index Key | 0001825437 |
| Entity Tax Identification Number | 85-2402980 |
| Entity Incorporation, State or Country Code | DE |
| Entity Address, Address Line One | 2735 Sand Hill Road |
| Entity Address, Address Line Two | Suite 110 |
| Entity Address, City or Town | Menlo Park |
| Entity Address, State or Province | CA |
| Entity Address, Postal Zip Code | 94025 |
| City Area Code | 650 |
| Local Phone Number | 515-3930 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | true |
| Elected Not To Use the Extended Transition Period | false |
| Units, each consisting of one share of common stock and one-half of one redeemable warrant | |
| Title of 12(b) Security | Units, each consisting of one share of common stock and one-half of one redeemable warrant |
| Trading Symbol | LJAQU |
| Security Exchange Name | NASDAQ |
| Common stock, par value $0.0001 per share | |
| Title of 12(b) Security | Common stock, par value $0.0001 per share |
| Trading Symbol | LJAQ |
| Security Exchange Name | NASDAQ |
| Redeemable warrants, exercisable for shares of common stock at an exercise price of $11.50 per share | |
| Title of 12(b) Security | Redeemable warrants, exercisable for shares of common stock at an exercise price of $11.50 per share |
| Trading Symbol | LJAQW |
| Security Exchange Name | NASDAQ |
