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Stock Incentive Plans - Additional Information (Detail) - Planet Labs Inc [Member] - USD ($) $ / shares in Units, $ in Thousands | 9 Months Ended | 12 Months Ended
--- | --- | ---
Oct. 31, 2021 | Oct. 31, 2020 | Jan. 31, 2021 | Jan. 31, 2020
Liquidity event deadline | 7 years |  | 7 years |
Share based payment arrangement, Expense | $ 13,133 | $ 11,481 | $ 14,538 | $ 6,028
Restricted Stock Units (RSUs) [Member] |  |  |  |
Share based compensation arrangement by share based payment award, Equity instruments other than options, Vested in period |  |  | 0 | 0
Restricted Stock Units (RSUs) [Member] | Liquidity Event [Member] |  |  |  |
Share based compensation arrangement by share based payment award, Shares issued in period | 0 |  | 0 |
Two Thousand And Eleven Stock Incentive Plan [Member] |  |  |  |
Common stock, Capital shares reserved for future issuance | 36,274,025 |  | 821,818 |
Two Thousand And Eleven Stock Incentive Plan [Member] | Share-based Payment Arrangement, Option [Member] |  |  |  |
Share based compensation arrangement by share based payment award, Expiration period | 10 years |  | 10 years |
Share based compensation arrangement by share based payment award, Award vesting period | 4 years |  | 4 years |
Share based compensation arrangement by share based payment award, Options, Exercises in period, Intrinsic value | $ 13,700 | $ 5,100 | $ 6,100 | $ 400
Share based compensation arrangement by share based payment award, Options, Grants in period, Weighted average grant date fair value | $ 5.81 | $ 2.60 | $ 2.83 | $ 2.51
Share based payment arrangement, Nonvested award, Option, Cost not yet recognized, Amount | $ 53,900 |  | $ 22,500 |
Share based payment arrangement, Nonvested award, Cost not yet recognized, Period for recognition | 3 years 5 months 4 days |  | 2 years 9 months 10 days |
Share based compensation arrangement by share based payment award, Options, Vested in period, Fair value |  |  | $ 10,200 |
Two Thousand And Eleven Stock Incentive Plan [Member] | Share-based Payment Arrangement, Option [Member] | 10% Stockholder [Member] |  |  |  |
Share based compensation arrangement by share based payment award, Expiration period | 5 years |  | 5 years |
Two Thousand And Eleven Stock Incentive Plan [Member] | Restricted Stock Units (RSUs) [Member] |  |  |  |
Share based compensation arrangement by share based payment award, Award vesting rights | An RSU will vest on the first date upon which both the service-based requirement and the liquidity event requirement are satisfied. |  | An RSU will vest on the first date upon which both the service-based requirement and the liquidity event requirement are satisfied. |
Share based compensation arrangement by share based payment award, Award requisite service period | 4 years |  | 4 years |
Share based compensation arrangement by share based payment award, Equity instruments other than options, Vested in period | 0 | 0 | 0 | 0
Share based payment arrangement, Expense | $ 0 | $ 0 | $ 0 | $ 0
Share based payment arrangement, Nonvested award, Excluding option, Cost not yet recognized, Amount | 41,800 |  | 6,600 |
Two Thousand And Eleven Stock Incentive Plan [Member] | Restricted Stock Units (RSUs) [Member] | Recognized Upon Liquidity Event [Member] |  |  |  |
Share based payment arrangement, Nonvested award, Excluding option, Cost not yet recognized, Amount | $ 13,300 |  | $ 3,200 |

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