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Leases - Narrative (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2020 | Jun. 30, 2020
Leases [Abstract] |  |
Incentive to lessee | $ 8.6 | $ 8.6

X
- Definition Proceeds From Tenant Incentives + References No definition available. + Details
Name: | tenb_ProceedsFromTenantIncentives
Namespace Prefix: | tenb_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_LeasesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration