Regeneron License and Collaboration Arrangement - Summary of Change in Company's Contract Liabilities (Details) - USD ($) $ in Thousands |
9 Months Ended | |||
---|---|---|---|---|
Sep. 30, 2021 |
Sep. 30, 2020 |
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Contract Assets | ||||
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items] | ||||
Balance at beginning of period | $ 0 | |||
Additions | 10,000 | |||
Additions (Deductions) (1) | [1] | (10,000) | ||
Balance at end of period | 0 | |||
Contract Liability | ||||
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items] | ||||
Balance at beginning of period | $ 13,980 | 21,883 | ||
Additions | 370 | 10,000 | ||
Additions (Deductions) (1) | [1] | (4,262) | (12,493) | |
Balance at end of period | $ 10,088 | $ 19,390 | ||
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