Milestone payments receivable.

No definition available.

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Non-refundable upfront payments received

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Number Of Licensed Product.

+ References

No definition available.

+ Details

Name:	tngx_NumberOfLicensedProduct
Namespace Prefix:	tngx_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Research Extension Fee .

+ References

No definition available.

+ Details

Name:	tngx_ResearchExtensionFee
Namespace Prefix:	tngx_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Research term.

+ References

No definition available.

+ Details

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Data Type:	xbrli:durationItemType
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

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 808
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479402/808-10-50-1

+ Details

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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of revenue recognized that was previously included in balance of obligation to transfer good or service to customer for which consideration from customer has been received or is due.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 8
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479806/606-10-50-8

+ Details

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Balance Type:	credit
Period Type:	duration

- Definition

Amount of transaction price allocated to performance obligation that has not been recognized as revenue.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (a)
-SubTopic 10
-Topic 606
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479806/606-10-50-13

+ Details

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Balance Type:	credit
Period Type:	instant

- Definition

Carrying amount of the par value of temporary equity outstanding. Temporary equity is a security with redemption features that are outside the control of the issuer, is not classified as an asset or liability in conformity with GAAP, and is not mandatorily redeemable. Includes any type of security that is redeemable at a fixed or determinable price or on a fixed or determinable date or dates, is redeemable at the option of the holder, or has conditions for redemption which are not solely within the control of the issuer. Includes stock with put option held by ESOP and stock redeemable by holder only in the event of a change in control of the issuer.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 942
-SubTopic 210
-Name Accounting Standards Codification
-Section S45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477657/942-210-S45-1

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 942
-SubTopic 210
-Name Accounting Standards Codification
-Section S50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478478/942-210-S50-1

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 942
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(18))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478546/942-210-S99-1

Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S50
-Paragraph 13
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480657/210-10-S50-13

Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(27)(c)(1))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

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Balance Type:	credit
Period Type:	instant

- Details

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- Details

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- Details

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- Details

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- Details

Name:	srt_ProductOrServiceAxis=tngx_CollaborationRevenueMember
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Collaboration Agreements - Additional Information (Details)	1 Months Ended		3 Months Ended			6 Months Ended		12 Months Ended
	Aug. 31, 2020 USD ($) Program	Oct. 31, 2018 Program	Jun. 30, 2026 USD ($)	Sep. 30, 2025 USD ($)	Jun. 30, 2025 USD ($)	Jun. 30, 2026 USD ($)	Jun. 30, 2025 USD ($)	Dec. 31, 2018 USD ($)	Sep. 30, 2021 USD ($)	Dec. 31, 2020 USD ($)
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Contract with customer liability, revenue recognized				$ 53,800,000
2018 Gilead Agreement [Member]
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Non-refundable upfront payment received						$ 50,000,000		$ 50,000,000
Number of licensed product \| Program		5
Amended Gilead Agreement [Member]
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Non-refundable upfront payment received						125,000,000
Number of licensed product \| Program	15
Temporary equity, par value	$ 125,000,000
Research term	7 years
Research extension fee									$ 24,000,000	$ 24,000,000
Amended Gilead Agreement [Member] \| Maximum [Member]
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Milestone payments receivable	$ 300,000,000
Gilead Agreement [Member]
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Transaction price allocated to performance obligation			$ 199,000,000			199,000,000
Collaboration Revenue [Member] \| Gilead Agreement [Member]
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Contract with customer liability, revenue recognized			$ 0		$ 3,200,000	$ 0	$ 8,600,000