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Commitment and Contingencies - Contingencies and Legal Proceedings (Details)	Dec. 31, 2021 USD ($)	Nov. 03, 2021 putativeClassActions	Dec. 31, 2020 USD ($)
Putative Class Actions Douvia v ON24 And Goemer v ON24 | Pending Litigation
Loss Contingencies [Line Items]
Number of pending claims | putativeClassActions		2
Accrued litigation expense	$ 0
Sales and Use Tax Assessments
Loss Contingencies [Line Items]
Loss contingency, range of possible loss, portion not accrued	0		$ 0
Sales and Use Tax Assessments | Minimum
Loss Contingencies [Line Items]
Loss contingency, estimate of possible loss	0
Sales and Use Tax Assessments | Maximum
Loss Contingencies [Line Items]
Loss contingency, estimate of possible loss	$ 400,000

X

- Definition

Aggregate carrying amount of the estimated litigation liability for known or estimated probable loss from litigation, which may include attorneys' fees and other litigation costs.

+ References

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- 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.

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- Definition

Reflects the estimated amount of loss from the specified contingency as of the balance sheet date.

+ References

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- Definition

Number of pending claims pertaining to a loss contingency.

+ References

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- Definition

The difference between the maximum amount of estimated loss and the amount recorded as of the balance sheet date.

+ References

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