Property and Equipment, Net - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Property, Plant and Equipment [Abstract]
Depreciation and amortization	$ 9.5	$ 8.1	$ 6.3

Depreciation and amortization related to property and equipment

No definition available.

Name:	tenb_DepreciationAndAmortizationPropertyAndEquipment
Namespace Prefix:	tenb_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration