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Revenue Recognition - Deferred Revenues (Details) - USD ($) $ in Thousands | 3 Months Ended |
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Mar. 31, 2021 | Dec. 31, 2020
Revenue recognized during the period that was included in deferred revenues at the beginning of the period | $ 30,292 |
Deferred revenue, current portion | 9,069 | $ 50,125
Deferred revenue, Long-term | 23,816 | 22,805
Deferred revenue | 32,885 | $ 72,930
BGI Genomics |  |
Deferred revenue, current portion | 3,200 |
Foundation Medicine ("FMI") |  |
Deferred revenue, current portion | 4,200 |
Qiagen |  |
Revenue recognized during the period that was included in deferred revenues at the beginning of the period | $ 28,600 |

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