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Balance Sheets Components (Tables) | 9 Months Ended
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Sep. 30, 2018
Organization Consolidation And Presentation Of Financial Statements [Abstract] |
Schedule of Accrued Expenses and Other Current Liabilities | Accrued expenses and other current liabilities consisted of the following (in thousands):
|  | September 30, 2018 |  |  | December 31, 2017 |
|  | (unaudited) |  |  |  |  |
Accrued personnel expenses |  | $ | 1,805 |  |  | $ | 1,108 |
Accrued clinical and development expenses |  |  | 3,215 |  |  |  | 2,250 |
Other |  |  | 340 |  |  |  | 201 |
Total |  | $ | 5,360 |  |  | $ | 3,559 |

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