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Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2018
Accounting Policies [Abstract] |
Schedule of Reconciliation of Cash, Cash Equivalents, and Restricted Cash | The following table provides a reconciliation of cash, cash equivalents, and restricted cash reported within the statement of financial position that sum to the total of the same such amounts shown in the statement of cash flows (in thousands).
|  | December 31, |  |  | December 31, |
|  | 2018 |  |  | 2017 |
Cash and cash equivalents |  | $ | 11,252 |  |  | $ | 58,440 |
Restricted cash included in other long-term assets |  |  | 1,097 |  |  |  | 1,097 |
Total cash, cash equivalents, and restricted cash shown in the consolidated statement of cash flows |  | $ | 12,349 |  |  | $ | 59,537 |
Schedule of Useful Life of Property and Equipment | Depreciation begins at the time the asset is placed in service. Depreciation is provided over the following estimated useful lives:
Asset classification |  | Useful life
Computer and office equipment |  | 3 years
Furniture and fixtures |  | 5 years
Laboratory equipment |  | 5 years
Leasehold improvements |  | Lesser of useful life or remaining lease term

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