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Stockholders' Equity - Additional Information (Details)
 1 Months Ended 12 Months Ended
Mar. 31, 2020
USD ($)
$ / shares
shares
Dec. 31, 2020
USD ($)
$ / shares
shares
Dec. 31, 2021
Dec. 31, 2020
$ / shares
shares
Mar. 31, 2020
$ / shares
Stockholders Equity [Line Items]          
Preferred shares converted into Peraso shares,value   $ 112,001,000      
Dividends preferred stock outstanding $ 22,732,543        
Shares issued of common stock for services | shares 591,757        
Fair value of preferred stock $ 11,133,786        
Exercise price of warrants | (per share)   $ 0.12   $ 0.15  
Exercise of warrant purchase | shares   6,628,495,000   6,628,495,000  
Fair value of warrant granted   $ 5,300,000      
Expected Dividend Rate          
Stockholders Equity [Line Items]          
Warrants and rights outstanding, measurement input   0 0 0  
Risk Free Interest Rate          
Stockholders Equity [Line Items]          
Warrants and rights outstanding, measurement input   0.36   0.36  
Expected Volatility          
Stockholders Equity [Line Items]          
Warrants and rights outstanding, measurement input   104.37 104.37 104.37  
Exercise Price in USD for CDN$1.00          
Stockholders Equity [Line Items]          
Exercise price of warrants | $ / shares   $ 0.79      
Exercise Price in USD for CDN$1.479          
Stockholders Equity [Line Items]          
Exercise price of warrants | $ / shares   1.16      
Exercise Price in USD for CDN$0.15          
Stockholders Equity [Line Items]          
Exercise price of warrants | $ / shares   $ 0.12      
Minimum          
Stockholders Equity [Line Items]          
Expected warrant life   1 year 11 months 1 day 3 years 2 months 12 days 1 year 11 months 1 day  
Minimum | Risk Free Interest Rate          
Stockholders Equity [Line Items]          
Warrants and rights outstanding, measurement input     0.37    
Maximum          
Stockholders Equity [Line Items]          
Expected warrant life   5 years 3 months 5 years 5 years 3 months  
Maximum | Risk Free Interest Rate          
Stockholders Equity [Line Items]          
Warrants and rights outstanding, measurement input     0.38    
Class A Preferred Shares          
Stockholders Equity [Line Items]          
Preferred shares converted into Peraso shares, shares | shares 124,408 124,000      
Preferred shares converted into Peraso shares,value $ 4,229,288 $ 4,229,000      
Class B Preferred Shares          
Stockholders Equity [Line Items]          
Preferred shares converted into Peraso shares, shares | shares 1,988,554 1,989,000      
Preferred shares converted into Peraso shares,value $ 52,102,651 $ 52,103,000      
Preferred Class A and B          
Stockholders Equity [Line Items]          
Preferred stock, convertible, conversion price | (per share) $ 0.72       $ 1.00
Class C Preferred Shares          
Stockholders Equity [Line Items]          
Preferred shares converted into Peraso shares, shares | shares 2,958,787 2,959,000      
Preferred shares converted into Peraso shares,value $ 55,668,932 $ 55,669,000      
Preferred stock, convertible, conversion price | (per share) $ 0.85       $ 1.18
Class C Preferred Shares | Minimum          
Stockholders Equity [Line Items]          
Conversion ratio 1        
Class C Preferred Shares | Maximum          
Stockholders Equity [Line Items]          
Conversion ratio 1.25