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Business Combinations - Aggregate Acquisition Consideration (Details) - Crystal - USD ($) $ in Thousands | Oct. 06, 2017 | Dec. 31, 2019
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Business Acquisition [Line Items] |  |
Cash paid to Crystal shareholders | $ 26,877 |
Cash payable to Crystal Shareholders | 336 | $ 20
Assumed liabilities | 129 |
Fair value of contingent consideration | 8,401 |
Total consideration | $ 35,743 |

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