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Acquisitions, Intangible Assets, and Goodwill - Acquisitions, Narrative (Details) - USD ($) $ in Thousands |  |  |  | 9 Months Ended | 12 Months Ended |
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Feb. 23, 2023 | Mar. 14, 2022 | Jan. 13, 2022 | Sep. 30, 2023 | Dec. 31, 2022 | Jun. 30, 2022
Trade name |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Useful life (in years) |  |  |  | 3 years 10 months 24 days | 4 years 7 months 6 days |
Content |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Useful life (in years) |  |  |  | 2 years 6 months | 3 years 1 month 6 days |
Customer relationships |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Useful life (in years) |  |  |  | 2 years 1 month 6 days | 2 years 3 months 18 days |
Developed technology |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Useful life (in years) |  |  |  | 4 years 1 month 6 days | 4 years 9 months 18 days |
Traffic Think Tank |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Consideration transferred | $ 1,800 |  |  |  |  |
Identifiable intangible assets | $ 594 |  |  |  |  |
Traffic Think Tank | Trade name |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Useful life (in years) | 6 years |  |  |  |  |
Traffic Think Tank | Content |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Useful life (in years) | 4 years |  |  |  |  |
Traffic Think Tank | Customer relationships |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Useful life (in years) | 5 years |  |  |  |  |
Traffic Think Tank | 12-Month Holdback Amount |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Business combination, holdback amount | $ 360 |  |  |  |  |
Traffic Think Tank | 18-Month Holdback Amount |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Business combination, holdback amount | $ 360 |  |  |  |  |
Kompyte |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Identifiable intangible assets |  | $ 5,500 |  |  |  | $ 5,500
Outstanding capital acquired (as percent) |  | 100.00% |  |  |  |
Cash consideration for acquisition |  | $ 10 |  |  |  |
Kompyte | Trade name |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Useful life (in years) |  | 6 years |  |  |  |
Kompyte | Customer relationships |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Useful life (in years) |  | 3 years |  |  |  |
Kompyte | Developed technology |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Useful life (in years) |  | 6 years |  |  |  |
Backlinko |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Identifiable intangible assets |  |  | $ 3,915 |  |  |
Cash consideration for acquisition |  |  | $ 4 |  |  |
Backlinko | Trade name |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Useful life (in years) |  |  | 5 years |  |  |
Backlinko | Content |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Useful life (in years) |  |  | 4 years |  |  |

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