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Stock Incentive Plans - Share based payment arrangement expensed and capitalized amount (Detail) - Planet Labs Inc [Member] - USD ($)
$ in Thousands
9 Months Ended 12 Months Ended
Oct. 31, 2021
Oct. 31, 2020
Jan. 31, 2021
Jan. 31, 2020
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]        
Total expense $ 13,133 $ 11,481 $ 14,538 $ 6,028
Capitalized internal-use software development costs (514) (392) (526) (957)
Total stock-based compensation expense 12,619 11,089 14,012 5,071
Cost of Sales [Member]        
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]        
Total expense 688 585 843 788
Research and Development Expense [Member]        
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]        
Total expense 4,582 2,898 4,109 2,754
Selling and Marketing Expense [Member]        
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]        
Total expense 1,959 1,193 1,687 1,234
General and Administrative Expense [Member]        
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]        
Total expense $ 5,904 $ 6,805 $ 7,899 $ 1,252