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Accrued Expenses and Other Current Liabilities (Tables) | 12 Months Ended
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Dec. 31, 2018
Payables And Accruals [Abstract] |
Accrued Expenses | Accrued expenses and other current liabilities consist of the following as of December 31, 2018 and 2017:
In thousands |  | December 31, 2018 |  |  | December 31, 2017 |
Payroll and payroll-related expenses | $ | 12,170 |  |  | $ | 8,298 |
Research and development expenses |  | — |  |  |  | 1,772 |
Sales and marketing accruals |  | 20,003 |  |  |  | 9,230 |
Accrued revenue allowances |  | 44,286 |  |  |  | 34,445 |
All other |  | 7,712 |  |  |  | 5,157 |
Accrued expenses and other current liabilities | $ | 84,171 |  |  | $ | 58,902 |

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- Definition Tabular disclosure of the components of accrued liabilities. + References No definition available. + Details
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