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Goodwill and Intangible Assets - Summary of Goodwill and Intangible Assets (Details) - QL Holdings LLC and Subsidiaries - USD ($) $ in Thousands | 9 Months Ended |  |
--- | --- | --- | ---
Sep. 30, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Goodwill And Intangible Assets [Line Items] |  |  |
Gross carrying amount | $ 26,567 | $ 59,957 |
Accumulated amortization | (10,217) | (41,205) |
Net carrying amount | 16,350 | 18,752 | $ 23,985
Goodwill | $ 18,402 | 18,402 | $ 18,402
Technology and Intellectual Property |  |  |
Goodwill And Intangible Assets [Line Items] |  |  |
Useful life (months) | 60 months |  |
Gross carrying amount |  | 32,027 |
Accumulated amortization |  | (32,027) |
Customer Relationships |  |  |
Goodwill And Intangible Assets [Line Items] |  |  |
Useful life (months) | 120 months |  |
Gross carrying amount | $ 25,040 | 25,040 |
Accumulated amortization | (9,285) | (7,094) |
Net carrying amount | $ 15,755 | 17,946 |
Costs to Acquire Third Party Publishers |  |  |
Goodwill And Intangible Assets [Line Items] |  |  |
Useful life (months) | 24 months |  |
Gross carrying amount |  | 1,363 |
Accumulated amortization |  | (1,363) |
Non-compete Agreements |  |  |
Goodwill And Intangible Assets [Line Items] |  |  |
Useful life (months) | 60 months |  |
Gross carrying amount | $ 303 | 303 |
Accumulated amortization | (197) | (155) |
Net carrying amount | $ 106 | 148 |
Domain Names |  |  |
Goodwill And Intangible Assets [Line Items] |  |  |
Useful life (months) | 60 months |  |
Gross carrying amount | $ 1,224 | 1,224 |
Accumulated amortization | (735) | (566) |
Net carrying amount | $ 489 | $ 658 |

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