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Acquisitions - 2019 Acquisitions (Details) - Thinkful, Inc - USD ($) $ in Thousands |  | 12 Months Ended |
--- | --- | --- | ---
Oct. 01, 2019 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2020
Business Acquisition [Line Items] |  |  |  |
Fair value of purchase consideration | $ 79,200 |  |  |
Total fair value of purchase consideration | 79,200 |  |  |
Escrow | $ 9,000 |  |  |
Escrow release period after acquisition | 18 months |  |  |
Contingent consideration arrangements | $ 20,000 |  |  | $ 12,800
Contingent purchase consideration, cash |  | $ 3,000 |  | $ 5,700
Acquisition related expenses |  | 1,000 |  |
Consolidated net loss attributed to acquiree since acquisition date |  | 8,600 |  |
Pro forma net income loss |  | $ 25,000 | $ 38,600 |

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