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Income Taxes - Summary of company's effective tax rates as a percentage of loss before income taxes (Detail) - Planet Labs Inc [Member]
12 Months Ended
Jan. 31, 2021
Jan. 31, 2020
Provision computed at federal statutory rate 21.00% 21.00%
States taxes, net of federal benefit 2.40% 2.40%
Foreign rate differential (0.80%) (1.00%)
Revaluation gain/loss (5.00%) 0.10%
Tax credits 2.30% 2.00%
Change in valuation allowance (21.30%) (23.90%)
Other 0.50% (0.70%)
Effective tax rate (0.90%) (0.10%)