Summary of Significant Accounting Policies (Policies)	3 Months Ended
Mar. 31, 2023
Accounting Policies [Abstract]
Principles of Consolidation	Principles of Consolidation The accompanying condensed consolidated financial statements include the accounts of the Company and its wholly-owned subsidiaries, TechTarget Securities Corporation (“TSC”), TechTarget Limited, TechTarget (HK) Limited (“TTGT HK”), TechTarget (Australia) Pty Ltd., TechTarget (Singapore) Pte Ltd., E-Magine Médias SAS (“LeMagIT”), TechTarget Germany GmbH, and BrightTALK Limited and its wholly owned subsidiary, BrightTALK, Inc. (together “BrightTALK”). TSC is a Massachusetts corporation. TechTarget Limited is a subsidiary doing business principally in the United Kingdom. TTGT HK is a subsidiary incorporated in Hong Kong in order to facilitate the Company’s activities in the Asia-Pacific region. TechTarget (Australia) Pty Ltd. and TechTarget (Singapore) Pte Ltd. are the entities through which the Company does business in Australia and Singapore, respectively; LeMagIT and TechTarget Germany GmbH, both wholly-owned subsidiaries of TechTarget Limited, are entities through which the Company does business in France and Germany, respectively. BrightTALK are the entities through which the Company conducts business related to its BrightTALK webinar and virtual event platform.
Basis of Presentation	Basis of Presentation The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted (Generally Accepted Accounting Principles or “U.S. GAAP”) in the United States (“U.S.”) for interim financial information and with the instructions to Form 10-Q and Rule 10-01 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by U.S. GAAP for complete financial statements. All adjustments, which, in the opinion of management, are considered necessary for a fair presentation of the results of operations for the periods shown, are of a normal, recurring nature and have been reflected in the condensed consolidated financial statements. The results of operations for the periods presented are not necessarily indicative of results to be expected for any other interim periods or for the full year. The information included in these condensed consolidated financial statements should be read in conjunction with “Management’s Discussion and Analysis of Financial Condition and Results of Operations” contained in this report and the condensed consolidated financial statements and accompanying notes included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2022.
Foreign Currency Translation	Foreign Currency Translation The functional currency of the Company’s major foreign subsidiaries is generally the local currency. Adjustments resulting from translating foreign functional currency financial statements into U.S. dollars are recorded as a separate component on the Condensed Consolidated Statement of Comprehensive Income as an element of accumulated other comprehensive income (loss). Foreign currency transaction gains and losses are included in interest and other income (expense), net in the Condensed Consolidated Statement of Income. All assets and liabilities denominated in foreign currency are translated into U.S. dollars at the exchange rate on the balance sheet date. Revenue and expenses are translated at the average exchange rate during the period.
Use of Estimates	Use of Estimates The preparation of condensed consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosures of contingent assets and liabilities at the date of the condensed consolidated financial statements and the reported amounts of revenue and expenses during the reporting period. On an ongoing basis, the Company evaluates its estimates, including those related to revenue, long-lived assets, goodwill, the allowance for doubtful accounts, stock-based compensation, earnouts, self-insurance accruals, the allocation of purchase price to intangibles and goodwill, and income taxes. The Company reduces its accounts receivable for an allowance for doubtful accounts based on its best estimate of the amount of probable credit losses. Estimates of the carrying value of certain assets and liabilities are based on historical experience and on various other assumptions that the Company believes to be reasonable. Actual results could differ from those estimates.
Revenue Recognition	Revenue Recognition The Company generates its revenue from the sale of targeted marketing and advertising campaigns, which it delivers via its network of websites, webinar and virtual events channels, and our data analytic services and solutions. Revenue is recognized when performance obligations are satisfied by transferring promised goods or services to customers, as determined by applying a five-step process consisting of: a) identifying the contract, or contracts, with a customer, b) identifying the performance obligations in the contract, c) determining the transaction price, d) allocating the transaction price to the performance obligations in the contract, and e) recognizing revenue when, or as, performance obligations are satisfied.
Cash and Cash Equivalents	Cash and Cash Equivalents The Company considers all highly liquid investments with original or remaining maturities of three months or less on the purchase date to be cash equivalents. Cash and cash equivalents carrying value approximate fair value and consist primarily of bank deposits and government backed money market funds.
Accounts Receivable	Accounts Receivable We maintain an allowance for credit losses for expected uncollectible accounts receivable, which is recorded as an offset to accounts receivable and changes in such are classified as general and administrative expense in the Condensed Consolidated Statements of Income and Comprehensive Income. We assess collectability by reviewing accounts receivable on an individual basis when we identify specific customers with known disputes, overdue amounts or collectability issues and also reserve for losses on all accounts based on historical information, current market conditions and reasonable and supportable forecasts of future economic conditions to inform adjustments to historical loss data. In determining the amount of the allowance for credit losses, we consider historical collectability based on past due status and make judgments about the creditworthiness of customers based on ongoing credit evaluations. At March 31, 2023, the Company’s collectability assessment includes the business and market disruptions caused by macro-economic uncertainty currently being experienced in the technology sector and estimates of expected emerging credit and collectability trends. The continued volatility in market conditions and evolving shifts in credit trends are difficult to predict, causing variability and volatility that may have a material impact on our allowance for credit losses in future periods.
Fair Value of Financial Instruments	Fair Value of Financial Instruments Financial instruments consist of cash and cash equivalents, short-term investments, accounts receivable, accounts payable, long-term debt and contingent consideration. Due to their short-term nature and liquidity, the carrying value of these instruments, with the exception of contingent consideration and long-term debt, approximates their estimated fair values. The Company classifies all of its short-term and long-term investments in debt securities as available-for-sale. The fair value of contingent consideration was estimated using a discounted cash flow method.
Business Combinations and Valuation of Goodwill and Acquired Intangible Assets	Business Combinations and Valuation of Goodwill and Acquired Intangible Assets The Company uses its best estimates and assumptions to allocate fair value to the net tangible and identifiable intangible assets acquired and liabilities assumed at the acquisition date. Any residual purchase price is recorded as goodwill. The Company’s estimates are inherently uncertain and subject to refinement and can include but are not limited to, the cash flows that an asset is expected to generate in the future, and the appropriate weighted-average cost of capital. During the measurement period, which may be up to one year from the acquisition date, the Company may record adjustments to the fair value of these tangible and intangible assets acquired and liabilities assumed, with the corresponding offset to goodwill. In addition, uncertain tax positions and tax-related valuation allowances are initially recorded in connection with a business combination as of the acquisition date. The Company continues to collect information and reevaluates these estimates and assumptions quarterly and records any adjustments to the Company’s preliminary estimates to goodwill provided that the Company is within the measurement period. Upon the conclusion of the measurement period or final determination of the fair value of assets acquired or liabilities assumed, whichever comes first, any subsequent adjustments are recorded to the Company’s Condensed Consolidated Statement of Income and Comprehensive Income.
Recent Accounting Pronouncements	Recent Accounting Pronouncements Recently Adopted Accounting Guidance In October 2021, the FASB issued ASU 2021-08, “Business Combinations (Topic 805): Accounting for Contract Assets and Contract Liabilities from Contracts with Customers,” which requires entities to apply Topic 606 to recognize and measure contract assets and contract liabilities in a business combination as if it had originated the contracts. The standard is effective for public companies for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2022. Early adoption is permitted. We adopted the new standard effective January 1, 2023 and the guidance did not have a material impact on our consolidated financial statements.

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