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Defined Contribution Plan - Additional Information (Detail)	12 Months Ended
	Jan. 31, 2021
Four Hundred And One K Plan [Member] | Planet Labs Inc [Member]
Defined contribution plan, Employer matching contribution, Percent of match	0.00%

X

- Definition

Percentage employer matches of the employee's percentage contribution matched.

+ References

No definition available.

+ Details

Name:	us-gaap_DefinedContributionPlanEmployerMatchingContributionPercentOfMatch
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_RetirementPlanNameAxis=dmyq_FourHundredAndOneKPlanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	dei_LegalEntityAxis=dmyq_PlanetLabsIncMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: