Class of warrants or rights redemption price.

No definition available.

Name:	dave_ClassOfWarrantsOrRightsRedemptionPrice
Namespace Prefix:	dave_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

Number of consecutive trading days for determining share price.

+ References

No definition available.

+ Details

Name:	dave_NumberOfConsecutiveTradingDaysForDeterminingSharePrice
Namespace Prefix:	dave_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of days of notice to be given for redemption of warrants.

+ References

No definition available.

+ Details

Name:	dave_NumberOfDaysOfNoticeToBeGivenForRedemptionOfWarrants
Namespace Prefix:	dave_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of days prior to the date of notifying the warrant holders for determining the total trading period.

+ References

No definition available.

+ Details

Name:	dave_NumberOfDaysPriorToTheDateOfNotifyingTheWarrantHoldersForDeterminingTheTotalTradingPeriod
Namespace Prefix:	dave_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of trading days for determining the share price.

+ References

No definition available.

+ Details

Name:	dave_NumberOfTradingDaysForDeterminingTheSharePrice
Namespace Prefix:	dave_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Stock issued during the period exercise of warrants.

+ References

No definition available.

+ Details

Name:	dave_StockIssuedDuringThePeriodExerciseOfWarrants
Namespace Prefix:	dave_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481112/505-10-50-3

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480738/235-10-S50-1

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(h)(4))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480678/235-10-S99-1

+ Details

Name:	us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

Number of securities into which each warrant or right may be converted. For example, but not limited to, each warrant may be converted into two shares.

+ References

+ Details

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

- Definition

Number of warrants or rights outstanding.

+ References

No definition available.

+ Details

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

- Definition

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

+ References

No definition available.

+ Details

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

- Definition

Ratio applied to the conversion of stock split, for example but not limited to, one share converted to two or two shares converted to one.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 505
-SubTopic 20
-Name Accounting Standards Codification
-Section S50
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479951/505-20-S50-2

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 505
-SubTopic 20
-Name Accounting Standards Codification
-Section S25
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479982/505-20-S25-2

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 4
-Subparagraph (SAB Topic 4.C)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480008/505-10-S99-4

+ Details

Name:	us-gaap_StockholdersEquityNoteStockSplitConversionRatio1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

- Definition

Description of the reverse stock split arrangement. Also provide the retroactive effect given by the reverse split that occurs after the balance sheet date but before the release of financial statements.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 20
-Name Accounting Standards Codification
-Section S50
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479951/505-20-S50-2

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 20
-Name Accounting Standards Codification
-Section S25
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479982/505-20-S25-2

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 4
-Subparagraph (SAB Topic 4.C)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480008/505-10-S99-4

+ Details

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

- Definition

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.

+ References

No definition available.

+ Details

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

- Definition

Expiration date 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 YYYY-MM-DD format.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (bbb)(2)(i)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (bbb)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (bbb)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

+ Details

Name:	us-gaap_WarrantsAndRightsOutstandingMaturityDate
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	instant

- Definition

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.

+ References

+ Details

Name:	us-gaap_WarrantsAndRightsOutstandingTerm
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	instant

- Details

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

- Details

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

- Details

Name:	dave_EventAxis=dave_AfterTheCompletionOfABusinessCombinationOrEarlierUponRedemptionOrLiquidationMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dave_TrigerringSharePriceForWarrantRedemptionAxis=dave_TriggeringSharePriceOneMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dave_WarrantRedemptionPriceAxis=dave_WarrantRedemptionPriceOneMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dave_TrigerringSharePriceForWarrantRedemptionAxis=dave_TriggeringSharePriceTwoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dave_WarrantRedemptionPriceAxis=dave_WarrantRedemptionPriceTwoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Warrant Liabilities - Additional Information (Detail)		9 Months Ended
Warrant Liabilities - Additional Information (Detail)	Jan. 04, 2023 shares	Sep. 30, 2026 $ / shares shares	Sep. 30, 2025 shares
Subsidiary or Equity Method Investee [Line Items]
Reverse stock split, description	1-for-32 reverse stock split effected on January 4, 2023
Reverse stock split, conversion ratio	0.03125
Number of warrants exercisable per common stock \| shares	32
Class of Warrants outstanding \| shares		11,430,667	11,444,235
Warrants [Member]
Subsidiary or Equity Method Investee [Line Items]
Class of Warrants outstanding \| shares		11,430,667
Warrant Liability Related To Debt Facility [Member]
Subsidiary or Equity Method Investee [Line Items]
Stock issued during the period exercise of warrants \| shares		14,087
After The Completion Of A Business Combination Or Earlier If Redeemed Or Upon Liquidation [Member]
Subsidiary or Equity Method Investee [Line Items]
Warrants expire date		Jan. 05, 2027
Class of warrants or rights term		5 years
Exercise price		$ 11.5
After The Completion Of A Business Combination Or Earlier If Redeemed Or Upon Liquidation [Member] \| Warrants [Member]
Subsidiary or Equity Method Investee [Line Items]
Exercise price		368
Triggering Share Price One [Member] \| Minimum [Member]
Subsidiary or Equity Method Investee [Line Items]
Share Price		$ 576
Number of days of notice to be given for the redemption of warrants		30 days
Number of consecutive trading days for determining the share price		20 days
Number of trading days for determining the share price		30 days
Number of days prior to the date of notifying the warrant holders for determining the total trading period		3 days
Triggering Share Price One [Member] \| Minimum [Member] \| Warrant Redemption Price One [Member]
Subsidiary or Equity Method Investee [Line Items]
Class of warrants or rights redemption price		$ 0.01
Triggering Share Price Two [Member] \| Minimum [Member]
Subsidiary or Equity Method Investee [Line Items]
Share Price		$ 320
Number of days of notice to be given for the redemption of warrants		30 days
Number of consecutive trading days for determining the share price		20 days
Number of trading days for determining the share price		30 days
Number of days prior to the date of notifying the warrant holders for determining the total trading period		3 days
Triggering Share Price Two [Member] \| Minimum [Member] \| Warrant Redemption Price Two [Member]
Subsidiary or Equity Method Investee [Line Items]
Class of warrants or rights redemption price		$ 0.1