| Cover | Jul. 20, 2021 |
| Document Type | 8-K/A |
| Amendment Flag | true |
| Amendment Description | Bilander Acquisition Corp. (the “Company”) is filing this Amendment No. 1 on Form 8-K/A (the “Amendment”) to amend and restate the Company’s audited balance sheet as of July 20, 2021 (the “Post-IPO Balance Sheet”) that had been filed with the Company’s Current Report on Form 8-K originally filed with the U.S. Securities and Exchange Commission (the “SEC”) on July 26, 2021 (the “Original 8-K”). |
| Document Period End Date | Jul. 20, 2021 |
| Entity File Number | 001-40426 |
| Entity Registrant Name | Bilander Acquisition Corp. |
| Entity Central Index Key | 0001845618 |
| Entity Tax Identification Number | 86-1973248 |
| Entity Incorporation, State or Country Code | DE |
| Entity Address, Address Line One | Four Embarcadero Center |
| Entity Address, Address Line Two | Suite 2100 |
| Entity Address, City or Town | San Francisco |
| Entity Address, State or Province | CA |
| Entity Address, Postal Zip Code | 94111 |
| City Area Code | (415) |
| Local Phone Number | 780-9975 |
| 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 Class A Common Stock and one-fourth of one Redeemable Warrant | |
| Title of 12(b) Security | Units, each consisting of one share of Class A Common Stock and one-fourth of one Redeemable Warrant |
| Trading Symbol | TWCBU |
| Security Exchange Name | NASDAQ |
| Class A Common Stock, par value $0.0001 per share | |
| Title of 12(b) Security | Class A Common Stock, par value $0.0001 per share |
| Trading Symbol | TWCB |
| Security Exchange Name | NASDAQ |
| Redeemable Warrants, each whole warrant exercisable for one share of Class A Common Stock at an exercise price of $11.50 | |
| Title of 12(b) Security | Redeemable Warrants, each whole warrant exercisable for one share of Class A Common Stock at an exercise price of $11.50 |
| Trading Symbol | TWCBW |
| Security Exchange Name | NASDAQ |
