Name:	prch_ClassOfWarrantOrRightExpiringPeriodAfterMergerForDeterminingSharePrice
Namespace Prefix:	prch_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

Represents the number of days commencing after merger for determining share price for warrants to purchase common stock.

No definition available.

Name:	prch_ClassOfWarrantOrRightNumberOfDaysForDeterminingSharePriceCommencement
Namespace Prefix:	prch_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

Price of a single share of a number of shares that can be issued for warrants.

No definition available.

Name:	prch_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantOrRightSharePrice
Namespace Prefix:	prch_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

Minimum number of days of Notice period for redemption of warrants to the warrant holders.

No definition available.

Name:	prch_ClassOfWarrantOrRightRedemptionMinimumNumberOfNoticeDays
Namespace Prefix:	prch_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

Price per share common stock subject to adjustments as specified.

No definition available.

Name:	prch_ClassOfWarrantOrRightRedemptionMinimumSharePriceOfCommonStock
Namespace Prefix:	prch_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

Redemption price per share for warrants.

No definition available.

Name:	prch_ClassOfWarrantOrRightRedemptionPricePerShare
Namespace Prefix:	prch_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

Represents the length of the trading day period commencing once the warrants become exercisable and ending on third trading day for the warrants redemption share price determination.

No definition available.

Name:	prch_ClassOfWarrantOrRightRedemptionSharePriceLengthOfTradingDayPeriod
Namespace Prefix:	prch_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

Represents the number of trading day period for the warrants redemption share price determination.

No definition available.

Name:	prch_ClassOfWarrantOrRightRedemptionSharePriceNumberOfTradingDayPeriod
Namespace Prefix:	prch_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

Shares issued on exercise of warrants

No definition available.

Name:	prch_StockIssuedDuringPeriodSharesWarrantsExercised
Namespace Prefix:	prch_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

Name:	us-gaap_ClassOfStockLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Number of securities into which the class of warrant or right may be converted. For example, but not limited to, 500,000 warrants may be converted into 1,000,000 shares.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21475-112644

Name:	us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

The cash inflow associated with the amount received from holders exercising their stock warrants.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 14
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3255-108585

Name:	us-gaap_ProceedsFromWarrantExercises
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Price of a single share of a number of saleable stocks of a company.

No definition available.

Name:	us-gaap_SharePrice
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

Name:	us-gaap_TypeOfArrangementAxis=prch_MergerAgreementWithProptechAcquisitionCorporationMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_ClassOfWarrantOrRightAxis=prch_PublicWarrantsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_ClassOfWarrantOrRightAxis=prch_CertainHoldersOfPublicWarrantsFirstGroupMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_ClassOfWarrantOrRightAxis=prch_CertainHoldersOfPublicWarrantsSecondGroupMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: