| Document and Entity Information | Sep. 13, 2022 |
| Document And Entity Information [Line Items] | |
| Amendment Flag | false |
| Entity Central Index Key | 0001819175 |
| Document Type | 8-K |
| Document Period End Date | Sep. 13, 2022 |
| Entity Registrant Name | PRIME IMPACT ACQUISITION I |
| Entity Incorporation State Country Code | E9 |
| Entity File Number | 001-39501 |
| Entity Tax Identification Number | 98-1554335 |
| Entity Address, Address Line One | 123 E San Carlos Street |
| Entity Address, Address Line Two | Suite 12 |
| Entity Address, City or Town | San Jose |
| Entity Address, State or Province | CA |
| Entity Address, Postal Zip Code | 95112 |
| City Area Code | (650) |
| Local Phone Number | 825-6965 |
| Written Communications | false |
| Soliciting Material | false |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | true |
| Entity Ex Transition Period | false |
| Units Each Consisting Of One Class A Ordinary Share And One Third Of One Warrant To Acquire One Class A Ordinary Share [Member] | |
| Document And Entity Information [Line Items] | |
| Security 12b Title | Units, each consisting of one Class A Ordinary Share and one-third of one Warrant to acquire one Class A Ordinary Share |
| Trading Symbol | PIAI.U |
| Security Exchange Name | NYSE |
| Class A Ordinary Shares Par Value 0.0001 Per Share [Member] | |
| Document And Entity Information [Line Items] | |
| Security 12b Title | Class A Ordinary Shares, par value $0.0001 per share |
| Trading Symbol | PIAI |
| Security Exchange Name | NYSE |
| Warrants Each Whole Warrant Exercisable For One Class A Ordinary Share At An Exercise Price Of 11.50 [Member] | |
| Document And Entity Information [Line Items] | |
| Security 12b Title | Warrants, each whole Warrant exercisable for one Class A Ordinary Share at an exercise price of $11.50 |
| Trading Symbol | PIAI.W |
| Security Exchange Name | NYSE |
