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Fair Value Measurements - Schedule of Changes in Fair Value of Financial Liabilities (Details) (fuboTV Inc. Pre-Merger) (10-K) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2020 | Mar. 31, 2020 | Sep. 30, 2019 | Mar. 31, 2019 | Sep. 30, 2020 | Sep. 30, 2019 | Dec. 31, 2019 | Dec. 31, 2018
Beginning balance |  | $ 3,574 |  |  | $ 3,574 |  |  |
Change in fair value of Level 3 liabilities | $ 101 |  | $ (1) |  | (426) | $ 1,017 |  |
Ending balance |  |  |  |  |  |  | $ 3,574 |
Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |  |  |
Beginning balance |  | 3,574 |  |  | 3,574 |  |  |
Ending balance | $ 30,205 |  |  |  | 30,205 |  | 3,574 |
Fubo TV Pre-Merger [Member] |  |  |  |  |  |  |  |
Beginning balance |  |  |  |  |  |  |  |
Issuance of convertible notes derivatives |  |  |  |  |  |  | 2,120 | $ 574
Change in fair value of Level 3 liabilities |  |  |  |  |  |  |  | (4,697)
Ending balance |  |  |  |  |  |  |  |
Fubo TV Pre-Merger [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |  |  |
Beginning balance |  |  |  |  |  |  |  | 4,123
Issuance of convertible notes derivatives |  |  |  | 2,120 |  |  | 2,120 | 574
Change in fair value of Level 3 liabilities |  |  |  |  |  |  |  | 1,074
Settlement of convertible notes |  |  |  | (2,120) |  |  | (2,120) | (5,771)
Ending balance |  |  |  |  |  |  |  |

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- Definition Issuance of convertible notes derivatives. + References No definition available. + Details
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- Definition Amount of increase (decrease) in the fair value of derivatives recognized in the income statement. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5618551-113959 + Details
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- Definition Fair value of financial obligations, including, but not limited to, debt instruments, derivative liabilities, federal funds purchased and sold under agreements to repurchase, securities loaned or sold under agreements to repurchase, financial instruments sold not yet purchased, guarantees, line of credit, loans and notes payable, servicing liability, and trading liabilities. + References No definition available. + Details
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