Debt Instrument, Basis Spread on Variable Rate, Variable Rate Floor

No definition available.

Name:	tenb_DebtInstrumentBasisSpreadonVariableRateVariableRateFloor
Namespace Prefix:	tenb_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Line Of Credit Facility, Decrease In Borrowing Capacity

+ References

No definition available.

+ Details

Name:	tenb_LineOfCreditFacilityIncreaseDecreaseInBorrowingCapacity
Namespace Prefix:	tenb_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Line of Credit, Accordion Feature, Covenant, Quick Ratio, Minimum

+ References

No definition available.

+ Details

Name:	tenb_LineofCreditAccordionFeatureCovenantQuickRatioMinimum
Namespace Prefix:	tenb_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	instant

- Definition

Line of Credit, Accordion Feature, Increase Limit

+ References

No definition available.

+ Details

Name:	tenb_LineofCreditAccordionFeatureIncreaseLimit
Namespace Prefix:	tenb_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The fee, expressed as a percentage of the line of credit facility, for the line of credit facility regardless of whether the facility has been used.

+ References

No definition available.

+ Details

Name:	us-gaap_LineOfCreditFacilityCommitmentFeePercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- 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.

+ Details

Name:	us-gaap_LineOfCreditFacilityLineItems
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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

+ Details

Name:	us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The carrying value as of the balance sheet date of the noncurrent portion of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22)
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 10
-Section 45
-Paragraph 14
-URI http://asc.fasb.org/extlink&oid=99376301&loc=d3e1336-112600

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 10
-Section 45
-Paragraph 13
-URI http://asc.fasb.org/extlink&oid=99376301&loc=d3e1314-112600

+ Details

Name:	us-gaap_LongTermLineOfCredit
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

Name:	us-gaap_DebtInstrumentAxis=tenb_A2020CreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=us-gaap_RevolvingCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VariableRateAxis=us-gaap_LondonInterbankOfferedRateLIBORMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VariableRateAxis=us-gaap_BaseRateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LineOfCreditFacilityAxis=tenb_SiliconValleyBankMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=us-gaap_LetterOfCreditMember
Namespace Prefix:
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Period Type:

Debt (Details)	Jul. 24, 2020 USD ($)	Jun. 30, 2020 USD ($)	Apr. 22, 2020 USD ($)	Apr. 21, 2020 USD ($)	Jun. 30, 2019 USD ($)
2020 Credit Facility \| Revolving Credit Facility \| Subsequent Event
Line of Credit Facility [Line Items]
Credit facility, maximum borrowing capacity	$ 45,000,000.0
Commitment fee percentage	0.35%
Uncommitted expansion	$ 45,000,000.0
Uncommitted expansion, minimum quick ratio covenant	1.5
LIBOR \| 2020 Credit Facility \| Revolving Credit Facility \| Subsequent Event
Line of Credit Facility [Line Items]
Debt instrument, basis spread on variable rate	2.00%
Debt instrument, basis spread on variable rate, variable rate floor	1.00%
Adjusted Base Rate \| 2020 Credit Facility \| Revolving Credit Facility \| Subsequent Event
Line of Credit Facility [Line Items]
Debt instrument, basis spread on variable rate	1.00%
Silicon Valley Bank \| Revolving Credit Facility
Line of Credit Facility [Line Items]
Long term line of credit, noncurrent		$ 0			$ 0
Credit facility, maximum borrowing capacity		25,000,000.0
Line of credit facility, decrease in borrowing capacity		$ 5,500,000
Silicon Valley Bank \| Letter of Credit
Line of Credit Facility [Line Items]
Credit facility, maximum borrowing capacity			$ 6,500,000	$ 5,000,000.0