| Cover | Aug. 30, 2021 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Aug. 30, 2021 |
| Entity File Number | 000-55922 |
| Entity Registrant Name | NUKKLEUS INC. |
| Entity Central Index Key | 0001592782 |
| Entity Tax Identification Number | 38-3912845 |
| Entity Incorporation, State or Country Code | DE |
| Entity Address, Address Line One | 525 Washington Blvd. |
| Entity Address, City or Town | Jersey City |
| Entity Address, State or Province | NJ |
| Entity Address, Postal Zip Code | 07310 |
| City Area Code | 212 |
| Local Phone Number | 791-4663 |
| 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 |
