| Cover | Dec. 01, 2021 |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Dec. 1, 2021 |
| Entity File Number | 001-39611 |
| Entity Registrant Name | Mallard Acquisition Corp. |
| Entity Central Index Key | 0001805795 |
| Entity Tax Identification Number | 84-4904992 |
| Entity Incorporation, State or Country Code | DE |
| Entity Address, Address Line One | 19701 Bethel Church Road |
| Entity Address, Address Line Two | Suite 302 |
| Entity Address, City or Town | Cornelius |
| Entity Address, State or Province | NC |
| Entity Address, Postal Zip Code | 28031 |
| City Area Code | 813 |
| Local Phone Number | 407-0444 |
| 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 | |
| Title of 12(b) Security | Units, each consisting of one share of Common Stock and one Redeemable Warrant entitling the holder to purchase one-half of one share of Common Stock |
| Trading Symbol | MACUU |
| 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 | MACU |
| Security Exchange Name | NASDAQ |
| Warrants, each exercisable for one-half share | |
| Title of 12(b) Security | Warrants, each exercisable for one-half share of Common Stock for $11.50 per whole share |
| Trading Symbol | MACUW |
| Security Exchange Name | NASDAQ |
