| Cover | Sep. 10, 2021 |
| Affiliate, Collateralized Security [Line Items] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Sep. 10, 2021 |
| Current Fiscal Year End Date | --12-31 |
| Entity File Number | 001-40790 |
| Entity Registrant Name | Bannix Acquisition Corp. |
| Entity Central Index Key | 0001845942 |
| Entity Tax Identification Number | 86-1626016 |
| Entity Incorporation, State or Country Code | DE |
| Entity Address, Address Line One | 300 Tice Boulevard; Suite 315 |
| Entity Address, Address Line Two | |
| Entity Address, City or Town | Woodcliff Lake |
| Entity Address, State or Province | NJ |
| Entity Address, Postal Zip Code | 07677 |
| City Area Code | (201) |
| Local Phone Number | 712-9800 |
| 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 |
| Entity Information, Former Legal or Registered Name | N/A |
| Units, each consisting of one share of Common Stock and one Redeemable Warrant and one Right | |
| Affiliate, Collateralized Security [Line Items] | |
| Title of 12(b) Security | Units, each consisting of one share of Common Stock and one Redeemable Warrant and one Right |
| Trading Symbol | BNIXU |
| Security Exchange Name | NASDAQ |
| Common Stock, par value $0.01 per share | |
| Affiliate, Collateralized Security [Line Items] | |
| Title of 12(b) Security | Common Stock, par value $0.01 per share |
| Trading Symbol | BNIX |
| Security Exchange Name | NASDAQ |
| Redeemable Warrants, each whole warrant exercisable for one share of Common Stock at an exercise price of $11.50 | |
| Affiliate, Collateralized Security [Line Items] | |
| Title of 12(b) Security | Redeemable Warrants, each whole warrant exercisable for one share of Common Stock at an exercise price of $11.50 |
| Trading Symbol | BNIXW |
| Security Exchange Name | NASDAQ |
| One Right to receive 1/10th of one share of Common Stock | |
| Affiliate, Collateralized Security [Line Items] | |
| Title of 12(b) Security | One Right to receive 1/10th of one share of Common Stock |
| Trading Symbol | BNIXR |
| Security Exchange Name | NASDAQ |
