| Cover | Mar. 29, 2022 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Mar. 29, 2022 |
| Entity File Number | 001-40221 |
| Entity Registrant Name | RESEARCH ALLIANCE CORP. II |
| Entity Central Index Key | 0001819724 |
| Entity Tax Identification Number | 85-2019822 |
| Entity Incorporation, State or Country Code | DE |
| Entity Address, Address Line One | 3172 North Rainbow Blvd |
| Entity Address, Address Line Two | #1278 |
| Entity Address, City or Town | Las Vegas |
| Entity Address, State or Province | NV |
| Entity Address, Postal Zip Code | 02116 |
| City Area Code | 617 |
| Local Phone Number | 778.2500 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Class A common stock, par value $0.0001 per share |
| Trading Symbol | RACB |
| Entity Emerging Growth Company | true |
| Elected Not To Use the Extended Transition Period | false |
