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Business Combinations - Assets acquired and liabilities assumed (Details) shares in Thousands, $ in Thousands |  |  | 12 Months Ended
--- | --- | --- | ---
Nov. 22, 2021 USD ($) shares | Feb. 15, 2019 USD ($) Milestone component | Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($) | Dec. 31, 2019 USD ($)
Business Combinations |  |  |  |  |
Contingent consideration liability |  |  | $ 1,717 |  |
Contingent considerations current |  |  | 1,717 | $ 1,198 |
Contingent considerations non-current |  |  |  | 462 |
Unrealized gain |  |  | 57 | (949) | $ (1,079)
Zentrick NV |  |  |  |  |
Business Combinations |  |  |  |  |
Cash consideration |  | $ 23,200 |  |  |
Closing adjustments |  | 200 |  |  |
Consideration held back |  | 100 |  |  |
Performance based deferred payment |  | $ 17,300 |  |  |
Number of component | component |  | 2 |  |  |
Performance based deferred payment, First component |  | $ 4,000 |  |  |
Number of milestone | Milestone |  | 4 |  |  |
Amour per milestone |  | $ 1,000 |  |  |
Performance based deferred payment, Second component |  | $ 13,000 |  |  |
Contingent consideration liability |  |  | 1,700 |  |
Unrealized gain |  |  | 100 | (900) | (1,100)
Zentrick NV | Tranche one |  |  |  |  |
Business Combinations |  |  |  |  |
Percentage of holdback payments |  | 50.00% |  |  |
Holdback payments payable period |  | 12 months |  |  |
Zentrick NV | Tranche two |  |  |  |  |
Business Combinations |  |  |  |  |
Percentage of holdback payments |  | 50.00% |  |  |
Holdback payments payable period |  | 24 months |  |  |
Zentrick NV | Maximum |  |  |  |  |
Business Combinations |  |  |  |  |
Business combination performance based deferred payment |  |  | 100 | $ 200 | $ 1,700
Zentrick NV | Other Current Liabilities |  |  |  |  |
Business Combinations |  |  |  |  |
Compensation liability |  |  | $ 1,100 |  |
Open Slate |  |  |  |  |
Business Combinations |  |  |  |  |
Cash consideration | $ 124,894 |  |  |  |
Common stock transferred | 22,526 |  |  |  |
Total | $ 147,420 |  |  |  |
Company common stock issued | shares | 684 |  |  |  |

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