Name:	us-gaap_ClassOfWarrantOrRightLineItems
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Data Type:	xbrli:stringItemType
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Period Type:	duration

Period between issuance and expiration of outstanding warrant and right embodying unconditional obligation requiring redemption by transferring asset at specified or determinable date or upon event certain to occur, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (bbb)(2)
-URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258

Name:	us-gaap_WarrantsAndRightsOutstandingTerm
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Period Type:	instant

Percentage of adjustment of exercise price of warrants based on market value and newly issued price.

No definition available.

Name:	wpf_ClassOfWarrantOrRightAdjustmentOfExercisePriceOfWarrantsOrRightsPercentBasedOnMarketValueAndNewlyIssuedPrice
Namespace Prefix:	wpf_
Data Type:	num:percentItemType
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Period Type:	duration

Percentage of adjustment of redemption price of stock based on market value and newly issued price.

No definition available.

Name:	wpf_ClassOfWarrantOrRightAdjustmentOfRedemptionPriceOfWarrantsOrRightsPercentBasedOnMarketValueAndNewlyIssuedPrice1
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Percentage of adjustment of redemption price of stock based on market value and newly issued price.

No definition available.

Name:	wpf_ClassOfWarrantOrRightAdjustmentOfRedemptionPriceOfWarrantsOrRightsPercentBasedOnMarketValueAndNewlyIssuedPrice2
Namespace Prefix:	wpf_
Data Type:	xbrli:pureItemType
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The minimum threshold period during which a written notice is required for redemption of warrants, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

No definition available.

Name:	wpf_ClassOfWarrantOrRightMinimumThresholdWrittenNoticePeriodForRedemptionOfWarrants
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Data Type:	xbrli:durationItemType
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Price of the entity's common stock which would be required to be attained to trigger the redemption of warrants.

No definition available.

Name:	wpf_ClassOfWarrantOrRightRedemptionOfWarrantsOrRightsStockPriceTrigger
Namespace Prefix:	wpf_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

Redemption price per share or per unit of warrants or rights outstanding.

No definition available.

Name:	wpf_ClassOfWarrantOrRightRedemptionPriceOfWarrantsOrRights
Namespace Prefix:	wpf_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

The number of trading days on which fair market value of shares is reported.

No definition available.

Name:	wpf_CommonStockTradingDaysOnWhichFairMarketValueOfSharesIsReported
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Data Type:	xbrli:integerItemType
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Period Type:	duration

The "fair market value" shall mean the volume weighted average price of the common stock for the 10 trading days ending on the trading day prior to the date on which the notice of exercise is received by the warrant agent.

No definition available.

Name:	wpf_FairMarketValuePerShare
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Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

The threshold number of specified trading period determining volume weighted average trading price , in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

No definition available.

Name:	wpf_NumberOfSpecifiedTradingDaysDeterminingVolumeWeightedAverageTradingPrice
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Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

The percentage of total equity related to new issuances which would trigger an adjustment in the exercise price of the warrant.

No definition available.

Name:	wpf_PercentageOfGrossProceedsOnTotalEquityProceeds
Namespace Prefix:	wpf_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

The maximum period of time in which the registrant must file a registration statement with the SEC after completion of a business combination.

No definition available.

Name:	wpf_PeriodForFillingRegistrationStatementAfterBusinessCombination
Namespace Prefix:	wpf_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

The period of time after filing a registration statement, which, if the registration statement is not declared effective, allows the warrant holder to do a cashless exercise.

No definition available.

Name:	wpf_PeriodOfTimeAfterWhichWarrantHolderMayDoCashlessExercise
Namespace Prefix:	wpf_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

The minimum threshold redemption period, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

No definition available.

Name:	wpf_RedemptionPeriod
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Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

The number of days after the expiration of the redemption measurement period which may pass before sending notice of redemption.

No definition available.

Name:	wpf_ThresholdNumberOfBusinessDaysBeforeSendingNoticeOfRedemptionToWarrantHolders
Namespace Prefix:	wpf_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

The threshold period for not to transfer, assign or sell any of the shares or warrants, after the completion of the initial business combination.

No definition available.

Name:	wpf_ThresholdPeriodForNotToTransferAssignOrSellAnySharesOrWarrantsAfterCompletionOfInitialBusinessCombination
Namespace Prefix:	wpf_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

The issuance price of additional capital which would trigger an adjustment in the exercise price of the warrant.

No definition available.

Name:	wpf_WarrantExercisePriceAdjustmentTrigger
Namespace Prefix:	wpf_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

The number of consecutive trading days within a specified range when the reported sale price must exceed the specified amount.

No definition available.

Name:	wpf_WarrantRedemptionMeasurementConsecutiveTradingDaysOverSpecifiedAmount
Namespace Prefix:	wpf_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

The number of trading days over which the reported sale price is measured when determining the redemption price.

No definition available.

Name:	wpf_WarrantRedemptionMeasurementPeriod
Namespace Prefix:	wpf_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

The warrants exercisable term after the completion of a business combination, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

No definition available.

Name:	wpf_WarrantsAndRightsOutstandingExercisableTermAfterBusinessCombination
Namespace Prefix:	wpf_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

The warrants exercisable term from the closing of the initial public offering, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

No definition available.

Name:	wpf_WarrantsAndRightsOutstandingExercisableTermFromClosingOfInitialPublicOffering
Namespace Prefix:	wpf_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

Name:	us-gaap_ClassOfWarrantOrRightAxis=wpf_PublicWarrantsMember
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Name:	srt_StatementScenarioAxis=wpf_RedemptionOfWarrantsWhenPricePerShareOfClassCommonStockEqualsOrExceeds18.00Member
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Name:	srt_StatementScenarioAxis=wpf_RedemptionOfWarrantsWhenPricePerShareOfClassCommonStockEqualsOrExceeds10.00Member
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