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Collaboration Agreements and Revenues - Summary of Product Revenue, Net (Detail) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2020 | Sep. 30, 2019
Disaggregation Of Revenue [Line Items] |  |  |  |
Total revenue | $ 44,032 | $ 33,174 | $ 111,320 | $ 248,603
Non-key Account Hospital Listing Award [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Total revenue | 2,900 |  | 5,500 |
Contractual Sales Rebate [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Total revenue | 2,000 |  | 3,700 |
Product [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Gross revenue | 27,900 | 622 | 53,105 | 622
Total revenue | 22,683 | 579 | 43,331 | 579
Product [Member] | Non-key Account Hospital Listing Award [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Total revenue | (2,930) | 0 | (5,495) | 0
Product [Member] | Contractual Sales Rebate [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Total revenue | (1,966) | (43) | (3,714) | (43)
Product [Member] | Other Discounts and Rebates [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Total revenue | (313) | 0 | (512) | 0
Product [Member] | Sales Return [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Total revenue | $ (8) | $ 0 | $ (53) | $ 0

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