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Revenue Recognition (Tables) | 9 Months Ended
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Sep. 30, 2019
Revenue Recognition [Abstract] |
Summary of Product Revenue Allowance and Reserve Categories | The following table summarizes balances and activity in each of the product revenue allowance and reserve categories for the nine months ended September 30, 2019 (in thousands):
|  | Chargebacks, distribution fees, discounts and other fees |  |  | Returns |  |  | Total |
Balance at December 31, 2018 |  | $ | 1,736 |  |  | $ | 569 |  |  | $ | 2,305 |
Provision related to current period sales |  |  | 10,937 |  |  |  | 1,724 |  |  |  | 12,661 |
Credit or payments made during the period |  |  | (8,689 | ) |  |  | (408 | ) |  |  | (9,097 | )
Balance at September 30, 2019 |  | $ | 3,984 |  |  | $ | 1,885 |  |  | $ | 5,869 |

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