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v3.21.1

Summary of significant accounting policies - Narrative (Details) $ in Thousands |  |  | 3 Months Ended |
--- | --- | --- | --- | ---
Jul. 17, 2020 USD ($) | Dec. 22, 2017 | Mar. 31, 2021 USD ($) segment | Mar. 31, 2020 USD ($) | Dec. 31, 2020 USD ($)
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Letters of Credit |  |  | $ 7,500 |  |
Term for letter of credit (in years) |  |  | 5 years |  |
Number of operating segments | segment |  |  | 1 |  |
Allowance for credit loss |  |  | $ 0 | $ 0 |
Increase in allowance for credit losses |  |  | 0 | 0 |
Allowance for doubtful accounts receivable |  |  | 200 |  | $ 100
Deferred payroll taxes provided for under CARES Act |  |  | 2,500 |  |
Cash consideration received from Royalty Purchase Agreement | $ 650,000 |  |  |  |
Federal income tax statutory rate |  | 21.00% |  |  |
Deferred tax liability |  |  | 122,000 |  |
Fifth Anniversary |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Letters of Credit |  |  | 3,800 |  |
Non-US |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Net product revenue |  |  | 47,800 | 40,700 |
United States |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Net product revenue |  |  | $ 43,500 | $ 27,500 |

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