Commitments and Contingencies - Additional Information (Details) $ in Millions	Sep. 02, 2021 USD ($)
Commitments and Contingencies.
Cash consideration	$ 48.6

The amount of cash consideration for shares issued.

No definition available.

Name:	prch_SharesIssuedDuringPeriodCashConsideration
Namespace Prefix:	prch_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration