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Balance Sheet Components - Accounts Payable and Accrued Liabilities Disclosure (Parenthetical) (Detail) - Planet Labs Inc [Member] - USD ($)
$ in Thousands
 1 Months Ended 9 Months Ended 12 Months Ended
Dec. 31, 2020
Oct. 31, 2021
Jan. 31, 2021
Jan. 31, 2020
Deferred research and development, Service liability, Current   $ 13,179 $ 8,208 $ 0
RD Services Agreement [Member]        
Research and development arrangement, Face amount of fee provided $ 40,200      
Research and development arrangement, Milestone period for fee provided 3 years      
Proceeds from fees received     8,300  
Research and development arrangement, Contract to perform for others, Costs incurred, Gross   $ 7,700 $ 0