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Marketable Securities - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Investments, Debt and Equity Securities [Abstract]
Financing receivable weighted average maturity	16 days		46 days
Proceeds from sale of marketable securities	$ 32,000	$ 3,900
Payments to acquire marketable securities	302,100	2
Marketable securities, gain (loss)	$ 76	$ 2

X

- Definition

Financing receivable weighted average maturity.

+ References

No definition available.

+ Details

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Namespace Prefix:	dave_
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X

- Definition

Payment to acquire marketable securities.

+ References

No definition available.

+ Details

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Namespace Prefix:	dave_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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X

- Definition

Proceeds from sale of marketable securities.

+ References

No definition available.

+ Details

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Namespace Prefix:	dave_
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X

- References

No definition available.

+ Details

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X

- Definition

Amount of unrealized and realized gain (loss) on investment in marketable security, including other-than-temporary impairment (OTTI).

+ References

No definition available.

+ Details

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