| Cover | Sep. 29, 2021 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Sep. 29, 2021 |
| Entity File Number | 001-40122 |
| Entity Registrant Name | ARYA SCIENCES ACQUISITION CORP IV |
| Entity Central Index Key | 0001838821 |
| Entity Tax Identification Number | 98-1574672 |
| Entity Incorporation, State or Country Code | E9 |
| Entity Address, Address Line One | 51 Astor Place |
| Entity Address, Address Line Two | 10th Floor |
| Entity Address, City or Town | New York |
| Entity Address, State or Province | NY |
| Entity Address, Postal Zip Code | 10003 |
| City Area Code | 212 |
| Local Phone Number | 284-2300 |
| Written Communications | true |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Class A Ordinary Shares, par value $0.0001 per share |
| Trading Symbol | ARYD |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | true |
| Elected Not To Use the Extended Transition Period | false |
