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Prepaid Expenses and Other Current Assets - Additional Information (Detail) $ in Millions	9 Months Ended
	Sep. 30, 2025 USD ($)
Prepaid Expense and Other Assets, Current [Abstract]
Increase in partner receivables	$ 6.5
Decrease in rebate receivables	$ 4.9

X

- Definition

Increase (decrease) in partner receivables.

+ References

No definition available.

+ Details

Name:	dave_IncreaseDecreaseInPartnerReceivables
Namespace Prefix:	dave_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Increase (decrease) in rebate receivables.

+ References

No definition available.

+ Details

Name:	dave_IncreaseDecreaseInRebateReceivables
Namespace Prefix:	dave_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- References

No definition available.

+ Details

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