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v3.20.1

Revenue Recognition - Additional Information (Details) - USD ($) | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2019 | Mar. 01, 2020 | Feb. 01, 2019
Disaggregation Of Revenue [Line Items] |  |  |
Revenue remaining unsatisfied performance obligation | $ 0 |  |
Payment term for customers | 120 days |  |
Subsequent Event |  |  |
Disaggregation Of Revenue [Line Items] |  |  |
Maximum amount of reduction in monthly co-payments of each prescription |  | $ 100 |
Maximum |  |  |
Disaggregation Of Revenue [Line Items] |  |  |
Amount of reduction patients could receive from cost of co-payments of first month of therapy |  |  | $ 300
Amount of reduction from the cost of each refill for maximum of 12 months |  |  | $ 250

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