Annual report pursuant to Section 13 and 15(d)

Cover Page

v3.21.1
Cover Page - USD ($)
5 Months Ended
Dec. 31, 2020
Mar. 26, 2021
Jun. 30, 2020
Document Information [Line Items]      
Document Type 10-K    
Amendment Flag false    
Document Annual Report true    
Document Transition Report false    
Document Period End Date Dec. 31, 2020    
Document Fiscal Year Focus 2020    
Document Fiscal Period Focus FY    
Current Fiscal Year End Date --12-31    
Entity Registrant Name Prime Impact Acquisition I    
Entity Central Index Key 0001819175    
Entity Incorporation, State or Country Code E9    
Entity Address, Country CA    
Title of 12(b) Security Class A ordinary shares, par value $0.0001 per share    
Trading Symbol PIAI    
Security Exchange Name NYSE    
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Non-accelerated Filer    
Entity Small Business true    
Entity Emerging Growth Company true    
Entity Ex Transition Period false    
Entity Shell Company true    
ICFR Auditor Attestation Flag false    
Entity Public Float     $ 0
Capital Units [Member]      
Document Information [Line Items]      
Title of 12(b) Security Units, each consisting of one share of Class A ordinary shares, and one Warrant to acquire one-third Class A ordinary share    
Trading Symbol PIAI.U    
Security Exchange Name NYSE    
Warrant [Member]      
Document Information [Line Items]      
Title of 12(b) Security 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    
Entity Common Stock, Shares Outstanding   13,371,770  
Common Class A [Member]      
Document Information [Line Items]      
Entity Common Stock, Shares Outstanding   22,952,010  
Common Class B [Member]      
Document Information [Line Items]      
Entity Common Stock, Shares Outstanding   8,102,103