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Description of Organization and Business Operations - Additional Information (Detail) - USD ($)
 1 Months Ended 9 Months Ended
Dec. 07, 2021
Oct. 31, 2021
Mar. 10, 2021
Mar. 09, 2021
Dec. 31, 2020
Sep. 30, 2021
Aug. 31, 2021
Jan. 31, 2021
Jan. 31, 2020
Organization Business And Basis Of Presentation [Line Items]                  
Initial Public Offering, units       34,500,000 34,500,000        
Initial Public Offering, price per unit       $ 10.00          
Initial Public Offering, gross proceeds       $ 345,000,000.0   $ 345,000,000      
Initial Public Offering, offering costs       19,600,000          
Initial Public Offering, deferred underwriting commissions       $ 12,100,000          
Initial Public Offering, private placement gross proceeds           8,900,000      
Cash         $ 0 $ 75,975      
Business Combination within in the Combination Period, possible per share value of residual assets remaining available for distribution           $ 10.00      
Business Combination required completion period after Initial Public Offering         24 months 24 months      
Franchise taxes          $ 400 $ 150,450      
Repayment of loans from related parties           1,116,142      
Class of warrants or rights warrants issued during the period units         5,333,333        
Planet Labs Inc [Member] | Credit Agreement With SVB and Hercules [Member]                  
Organization Business And Basis Of Presentation [Line Items]                  
Repayment of oustanding principal,accrued interest and repayment fees of credit agreement   $ 67,100              
Subsequent Event [Member] | Planet Labs Inc [Member]                  
Organization Business And Basis Of Presentation [Line Items]                  
Common and preferred stock conversion exchange ratio 1.53184                
Proceeds from conversion of equity gross $ 590,200                
Proceeds from private investment in public equity gross 252,000.0                
Payments of transaction expenses upon closing of the business combination $ 54,400                
Liquidity and Capital Resources [Member]                  
Organization Business And Basis Of Presentation [Line Items]                  
Cash           76,000      
Net Working Capital           3.7      
Interest income held in Trust account           99,000      
Common Class A [Member]                  
Organization Business And Basis Of Presentation [Line Items]                  
Initial Public Offering, gross proceeds           $ 345,000,000      
Common stock, par value         $ 0.0001 $ 0.0001      
Common stock, price per public share         $ 10.00 $ 10.00      
Common Class A [Member] | Planet Labs Inc [Member]                  
Organization Business And Basis Of Presentation [Line Items]                  
Common stock, par value   $ 0.00002           $ 0.00002 $ 0.00002
Maximum [Member]                  
Organization Business And Basis Of Presentation [Line Items]                  
Business Combination, maximum amount of interest to pay dissolution expenses         $ 100,000 $ 100,000      
Percentage of aggregate Public Shares restricted from redeem         20.00% 20.00%      
Public Shares redeemable amount limit of net tangible assets         $ 5,000,001 $ 5,000,001      
Trust Account [Member]                  
Organization Business And Basis Of Presentation [Line Items]                  
Initial Public Offering, price per unit       $ 10.00          
Initial Public Offering, gross proceeds       $ 345,000,000.0          
Underwriters Over Allotment [Member]                  
Organization Business And Basis Of Presentation [Line Items]                  
Initial Public Offering, units       4,500,000          
Private Placement [Member]                  
Organization Business And Basis Of Presentation [Line Items]                  
Initial Public Offering, units       5,933,333          
Initial Public Offering, price per unit       $ 1.50          
Initial Public Offering, private placement gross proceeds       $ 8,900,000          
IPO [Member]                  
Organization Business And Basis Of Presentation [Line Items]                  
Initial Public Offering, units       34,500,000 30,000,000        
Initial Public Offering, price per unit       $ 10.00 $ 10.00        
Initial Public Offering, gross proceeds       $ 345,000,000.0          
Initial Public Offering, offering costs       19,600,000          
Initial Public Offering, deferred underwriting commissions       $ 12,100,000          
Over-Allotment Option [Member]                  
Organization Business And Basis Of Presentation [Line Items]                  
Initial Public Offering, units       4,500,000 4,500,000        
Initial Public Offering, price per unit       $ 11.50 $ 11.50        
Class of warrants or rights warrants issued during the period units         5,933,333        
Sponsor [Member]                  
Organization Business And Basis Of Presentation [Line Items]                  
Contribution from the sponsor           25,000      
Proceeds from notes payable to related party current           200,000      
Advances received from related parties           791,000 $ 37,000    
Repayment of loans from related parties     $ 991,000            
Sponsor [Member] | Subsequent Event [Member]                  
Organization Business And Basis Of Presentation [Line Items]                  
Advances received from related parties             $ 37,000    
Sponsor [Member] | Maximum [Member]                  
Organization Business And Basis Of Presentation [Line Items]                  
Proceeds from notes payable to related party current         $ 200,000 $ 200,000