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Fair Value of Financial Instruments - Schedule of Fair Value of Financial Assets and Liabilities (Details) - USD ($) $ in Thousands | Jun. 30, 2021 | Dec. 31, 2020
--- | --- | ---
Assets |  |
Marketable securities | $ 403,264 | $ 137,500
Commercial Paper |  |
Assets |  |
Marketable securities | 375,699 | 113,622
Harvard |  |
Liabilities |  |
Success payment liability | 42,600 | 35,500
Broad Institute |  |
Liabilities |  |
Success payment liability | 42,800 | 35,700
Recurring | Carrying Amount |  |
Assets |  |
Total assets | 643,491 | 298,567
Liabilities |  |
Total liabilities | 122,959 | 71,200
Recurring | Carrying Amount | Money Market Funds |  |
Assets |  |
Cash equivalents | 203,399 | 88,259
Recurring | Carrying Amount | Commercial Paper |  |
Assets |  |
Cash equivalents | 7,498 | 60,494
Marketable securities | 375,699 | 113,622
Recurring | Carrying Amount | Corporate Notes |  |
Assets |  |
Cash equivalents |  | 12,314
Marketable securities | 27,565 | 7,836
Recurring | Carrying Amount | Corporate Equity Securities |  |
Assets |  |
Equity securities included in other long-term investments | 29,330 |
Recurring | Carrying Amount | Government Securities |  |
Assets |  |
Marketable securities |  | 5,033
Recurring | Carrying Amount | U.S. Treasury Securities |  |
Assets |  |
Marketable securities |  | 11,009
Recurring | Carrying Amount | Contingent Consideration of Technology Liabilities |  |
Liabilities |  |
Contingent consideration liability | 30,348 |
Recurring | Carrying Amount | Contingent Consideration of Product Liabilities |  |
Liabilities |  |
Contingent consideration liability | 7,211 |
Recurring | Fair Value |  |
Assets |  |
Total assets | 643,491 | 298,564
Liabilities |  |
Total liabilities | 122,959 | 71,200
Recurring | Fair Value | Money Market Funds |  |
Assets |  |
Cash equivalents | 203,399 | 88,259
Recurring | Fair Value | Commercial Paper |  |
Assets |  |
Cash equivalents | 7,498 | 60,497
Marketable securities | 375,699 | 113,622
Recurring | Fair Value | Corporate Notes |  |
Assets |  |
Cash equivalents |  | 12,308
Marketable securities | 27,565 | 7,836
Recurring | Fair Value | Corporate Equity Securities |  |
Assets |  |
Equity securities included in other long-term investments | 29,330 |
Recurring | Fair Value | Government Securities |  |
Assets |  |
Marketable securities |  | 5,033
Recurring | Fair Value | U.S. Treasury Securities |  |
Assets |  |
Marketable securities |  | 11,009
Recurring | Fair Value | Contingent Consideration of Technology Liabilities |  |
Liabilities |  |
Contingent consideration liability | 30,348 |
Recurring | Fair Value | Contingent Consideration of Product Liabilities |  |
Liabilities |  |
Contingent consideration liability | 7,211 |
Recurring | Fair Value | Level 1 |  |
Assets |  |
Total assets | 203,399 | 88,259
Recurring | Fair Value | Level 1 | Money Market Funds |  |
Assets |  |
Cash equivalents | 203,399 | 88,259
Recurring | Fair Value | Level 2 |  |
Assets |  |
Total assets | 440,092 | 210,305
Recurring | Fair Value | Level 2 | Commercial Paper |  |
Assets |  |
Cash equivalents | 7,498 | 60,497
Marketable securities | 375,699 | 113,622
Recurring | Fair Value | Level 2 | Corporate Notes |  |
Assets |  |
Cash equivalents |  | 12,308
Marketable securities | 27,565 | 7,836
Recurring | Fair Value | Level 2 | Corporate Equity Securities |  |
Assets |  |
Equity securities included in other long-term investments | 29,330 |
Recurring | Fair Value | Level 2 | Government Securities |  |
Assets |  |
Marketable securities |  | 5,033
Recurring | Fair Value | Level 2 | U.S. Treasury Securities |  |
Assets |  |
Marketable securities |  | 11,009
Recurring | Fair Value | Level 3 |  |
Liabilities |  |
Total liabilities | 122,959 | 71,200
Recurring | Fair Value | Level 3 | Contingent Consideration of Technology Liabilities |  |
Liabilities |  |
Contingent consideration liability | 30,348 |
Recurring | Fair Value | Level 3 | Contingent Consideration of Product Liabilities |  |
Liabilities |  |
Contingent consideration liability | 7,211 |
Recurring | Harvard | Carrying Amount |  |
Liabilities |  |
Success payment liability | 42,600 | 35,500
Recurring | Harvard | Fair Value |  |
Liabilities |  |
Success payment liability | 42,600 | 35,500
Recurring | Harvard | Fair Value | Level 3 |  |
Liabilities |  |
Success payment liability | 42,600 | 35,500
Recurring | Broad Institute | Carrying Amount |  |
Liabilities |  |
Success payment liability | 42,800 | 35,700
Recurring | Broad Institute | Fair Value |  |
Liabilities |  |
Success payment liability | 42,800 | 35,700
Recurring | Broad Institute | Fair Value | Level 3 |  |
Liabilities |  |
Success payment liability | $ 42,800 | $ 35,700

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