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Summary of Significant Accounting Policies - Product revenue allowance and reserve categories (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022
Product revenue allowance and reserve categories |  |
Beginning Balance | $ 2,809 | $ 474
Provision related to sales in the current year | 19,023 | 3,666
Credit and payments made | (12,158) | (1,331)
Ending balance | 9,674 | 2,809
Provision for Cash Discounts |  |
Product revenue allowance and reserve categories |  |
Beginning Balance | 99 | 21
Provision related to sales in the current year | 1,672 | 367
Credit and payments made | (1,572) | (289)
Ending balance | 199 | 99
Fees, Rebates and Other Incentives |  |
Product revenue allowance and reserve categories |  |
Beginning Balance | 2,710 | 453
Provision related to sales in the current year | 17,351 | 3,299
Credit and payments made | (10,586) | (1,042)
Ending balance | $ 9,475 | $ 2,710

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