XML 50 R41.htm IDEA: XBRL DOCUMENT
v3.26.1

Goodwill - Additional Information (Detail) | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jun. 30, 2026 USD ($) | Mar. 31, 2026 USD ($) | Jun. 30, 2025 USD ($) | Jun. 30, 2026 USD ($) Unit | Jun. 30, 2025 USD ($) | Dec. 31, 2025 USD ($) Unit
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |
Goodwill gross carrying amount | $ 1,183,600,000 |  |  | $ 1,183,600,000 |  |
Goodwill accumulated impairment losses | 1,182,500,000 |  |  | 1,182,500,000 |  |
Goodwill | 1,094,000 | $ 1,077,000 |  | $ 1,094,000 |  | $ 45,550,000
Number of reporting units | Unit |  |  |  | 2 |  | 5
Impairment charge | 0 | $ 45,006,000 | $ 382,248,000 | $ 45,006,000 | $ 841,348,000 |
Period to reach stable growth rate in long term |  |  |  | 3 years |  |
Post Reorganization [Member] |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |
Number of reporting units | Unit |  |  |  | 2 |  |
Canalys [Member] | Prior to Reorganization [Member] |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |
Impairment charge |  |  | 382,200,000 | $ 8,100,000 | 841,300,000 |
Industry Dive [Member] | Prior to Reorganization [Member] |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |
Impairment charge |  |  | 382,200,000 |  | 841,300,000 |
Bluefin Legacy [Member] | Prior to Reorganization [Member] |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |
Impairment charge |  |  | 382,200,000 | 3,700,000 | 841,300,000 |
NetLine [Member[ | Prior to Reorganization [Member] |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |
Impairment charge |  |  |  | 6,800,000 |  |
legacy TechTarget [Member] | Prior to Reorganization [Member] |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |
Impairment charge |  |  | 382,200,000 |  | 841,300,000 |
Brand to Demand [Member] |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |
Goodwill | $ 0 |  |  | 0 |  |
Brand to Demand [Member] | Post Reorganization [Member] |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |
Impairment charge |  |  |  | $ 26,400,000 |  |
Intelligence & Advisory [Member] |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |
Goodwill |  |  | $ 1,100,000 |  | $ 1,100,000 |
Level 3 [Member] | Discount Rate [Member] | Maximum [Member] |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |
Rate used in impairment test for reporting units |  |  |  | 0.255 |  |
Level 3 [Member] | Discount Rate [Member] | Minimum [Member] |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |
Rate used in impairment test for reporting units |  |  |  | 0.215 |  |

X
- Definition Period to reach stable growth rate in long term. + References No definition available. + Details
Name: | ttgt_PeriodToReachStableGrowthRateInLongTerm
Namespace Prefix: | ttgt_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Rate used in impairment test for reporting units. + References No definition available. + Details
Name: | ttgt_RateUsedInImpairmentTestForReportingUnits
Namespace Prefix: | ttgt_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | duration

X
- 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/2009/role/commonPracticeRef -Topic 350 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482558/350-40-50-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 985 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481283/985-20-50-2 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (d)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482665/350-30-50-2 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482665/350-30-50-3 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (d)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482665/350-30-50-2 Reference 6: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 985 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (b)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481283/985-20-50-1 Reference 7: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 985 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (b)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481283/985-20-50-1 Reference 8: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 985 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481283/985-20-50-1 Reference 9: http://www.xbrl.org/2003/role/exampleRef -Topic 805 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 31 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479876/805-20-55-31 Reference 10: http://www.xbrl.org/2003/role/exampleRef -Topic 805 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 20 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479876/805-20-55-20 Reference 11: http://www.xbrl.org/2003/role/exampleRef -Topic 805 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 20 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479876/805-20-55-20 Reference 12: http://www.xbrl.org/2003/role/exampleRef -Topic 805 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 38 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479876/805-20-55-38 Reference 13: http://www.xbrl.org/2003/role/exampleRef -Topic 805 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 31 -Subparagraph (h) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479876/805-20-55-31 Reference 14: http://www.xbrl.org/2003/role/exampleRef -Topic 805 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 38 -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479876/805-20-55-38 Reference 15: http://www.xbrl.org/2003/role/exampleRef -Topic 805 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 38 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479876/805-20-55-38 Reference 16: http://www.xbrl.org/2003/role/exampleRef -Topic 805 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 38 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479876/805-20-55-38 Reference 17: http://www.xbrl.org/2003/role/exampleRef -Topic 805 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 38 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479876/805-20-55-38 Reference 18: http://www.xbrl.org/2003/role/exampleRef -Topic 805 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 38 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479876/805-20-55-38 Reference 19: http://www.xbrl.org/2003/role/exampleRef -Topic 805 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 31 -Subparagraph (i) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479876/805-20-55-31 Reference 20: http://www.xbrl.org/2003/role/exampleRef -Topic 805 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 31 -Subparagraph (g) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479876/805-20-55-31 Reference 21: http://www.xbrl.org/2003/role/exampleRef -Topic 805 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 31 -Subparagraph (f) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479876/805-20-55-31 Reference 22: http://www.xbrl.org/2003/role/exampleRef -Topic 805 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 31 -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479876/805-20-55-31 Reference 23: http://www.xbrl.org/2003/role/exampleRef -Topic 805 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 31 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479876/805-20-55-31 Reference 24: http://www.xbrl.org/2003/role/exampleRef -Topic 805 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 31 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479876/805-20-55-31 Reference 25: http://www.xbrl.org/2003/role/exampleRef -Topic 805 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 31 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479876/805-20-55-31 Reference 26: http://www.xbrl.org/2003/role/exampleRef -Topic 805 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 31 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479876/805-20-55-31 Reference 27: http://www.xbrl.org/2003/role/exampleRef -Topic 805 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 29 -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479876/805-20-55-29 Reference 28: http://www.xbrl.org/2003/role/exampleRef -Topic 805 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 29 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479876/805-20-55-29 Reference 29: http://www.xbrl.org/2003/role/exampleRef -Topic 805 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 20 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479876/805-20-55-20 Reference 30: http://www.xbrl.org/2003/role/exampleRef -Topic 805 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 20 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479876/805-20-55-20 Reference 31: http://www.xbrl.org/2003/role/exampleRef -Topic 805 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 14 -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479876/805-20-55-14 Reference 32: http://www.xbrl.org/2003/role/exampleRef -Topic 805 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 14 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479876/805-20-55-14 Reference 33: http://www.xbrl.org/2003/role/exampleRef -Topic 805 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 14 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479876/805-20-55-14 Reference 34: http://www.xbrl.org/2003/role/exampleRef -Topic 805 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 14 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479876/805-20-55-14 Reference 35: http://www.xbrl.org/2003/role/exampleRef -Topic 805 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 14 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479876/805-20-55-14 Reference 36: http://www.xbrl.org/2003/role/exampleRef -Name Accounting Standards Codification -Section 55 -Paragraph 40 -SubTopic 30 -Topic 350 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482640/350-30-55-40 Reference 37: http://www.xbrl.org/2003/role/disclosureRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482686/350-30-45-1 Reference 38: http://www.xbrl.org/2003/role/disclosureRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482665/350-30-50-2 Reference 39: http://www.xbrl.org/2003/role/disclosureRef -Topic 926 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Publisher FASB -URI https://asc.fasb.org/1943274/2147483154/926-20-50-5 + Details
Name: | us-gaap_FiniteLivedIntangibleAssetsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount, after accumulated impairment loss, of asset representing future economic benefit arising from other asset acquired in business combination or from joint venture formation or both, that is not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -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/2003/role/disclosureRef -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/2003/role/exampleRef -Topic 805 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 41 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479303/805-10-55-41 Reference 4: http://www.xbrl.org/2003/role/exampleRef -Topic 805 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 8 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479328/805-10-50-8 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480657/210-10-S50-6 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(15)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 7: http://www.xbrl.org/2003/role/exampleRef -Topic 350 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 24 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482548/350-20-55-24 Reference 8: http://www.xbrl.org/2003/role/exampleRef -Topic 805 -SubTopic 740 -Name Accounting Standards Codification -Section 55 -Paragraph 13 -Publisher FASB -URI https://asc.fasb.org/1943274/2147478064/805-740-55-13 Reference 9: http://www.xbrl.org/2003/role/exampleRef -Topic 805 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 39 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479303/805-10-55-39 Reference 10: http://www.xbrl.org/2003/role/exampleRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 49 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482785/280-10-55-49 Reference 11: http://www.xbrl.org/2003/role/exampleRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 100 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482078/820-10-55-100 Reference 12: http://www.xbrl.org/2003/role/exampleRef -Topic 852 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 10 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481372/852-10-55-10 Reference 13: http://www.xbrl.org/2003/role/disclosureRef -Topic 350 -SubTopic 20 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482598/350-20-45-1 Reference 14: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 350 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482573/350-20-50-1 Reference 15: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 350 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (h) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482573/350-20-50-1 Reference 16: http://www.xbrl.org/2003/role/disclosureRef -Topic 942 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(10)(1)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478546/942-210-S99-1 Reference 17: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 805 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479581/805-30-50-4 + Details
Name: | us-gaap_Goodwill
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount, before accumulated impairment loss, of asset representing future economic benefit arising from other asset acquired in business combination or from joint venture formation or both, that is not individually identified and separately recognized. Includes amount, before amortization expense and impairment loss, of goodwill for private company. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 350 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482573/350-20-50-5 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 350 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482573/350-20-50-4 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Topic 350 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 24 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482548/350-20-55-24 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 350 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482573/350-20-50-1 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 350 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (h) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482573/350-20-50-1 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 805 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479581/805-30-50-4 + Details
Name: | us-gaap_GoodwillGross
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of accumulated impairment loss for asset representing future economic benefit arising from other asset acquired in business combination or from joint venture formation or both, that is not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 350 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482573/350-20-50-5 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 350 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 24 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482548/350-20-55-24 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 350 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482573/350-20-50-1 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 350 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (h) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482573/350-20-50-1 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 805 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479581/805-30-50-4 + Details
Name: | us-gaap_GoodwillImpairedAccumulatedImpairmentLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of impairment loss from asset representing future economic benefit arising from other asset acquired in business combination or from joint venture formation or both, that is not individually identified and separately recognized. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 45 -Paragraph 28 -Subparagraph (b) -SubTopic 10 -Topic 230 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-28 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 350 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 24 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482548/350-20-55-24 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 350 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482573/350-20-50-2 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 350 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482573/350-20-50-6 Reference 5: http://www.xbrl.org/2003/role/exampleRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 100 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482078/820-10-55-100 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 350 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482573/350-20-50-1 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Topic 350 -SubTopic 20 -Name Accounting Standards Codification -Section 45 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482598/350-20-45-2 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Topic 805 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479581/805-30-50-4 + Details
Name: | us-gaap_GoodwillImpairmentLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Number of reporting units tested for impairment of goodwill. A reporting unit is an operating segment or one level below an operating segment. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 350 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482573/350-20-50-2 + Details
Name: | us-gaap_NumberOfReportingUnits
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_RestructuringPlanAxis=ttgt_PostReorganizationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ReportingUnitAxis=ttgt_CanalysMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RestructuringPlanAxis=ttgt_PriorToReorganizationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ReportingUnitAxis=ttgt_IndustryDiveMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ReportingUnitAxis=ttgt_BluefinLegacyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ReportingUnitAxis=ttgt_NetLineMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ReportingUnitAxis=ttgt_LegacyTechTargetMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ReportingUnitAxis=ttgt_BrandToDemandMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ReportingUnitAxis=ttgt_IntelligenceAndAdvisoryMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel3Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_MeasurementInputTypeAxis=us-gaap_MeasurementInputDiscountRateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |