Summary of Significant Accounting Policies - Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation (Details) $ in Thousands |
9 Months Ended |
---|---|
Sep. 30, 2017
USD ($)
| |
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] | |
Beginning balance | $ 133 |
Reclassification of preferred stock warrant to common stock warrant | 51 |
Ending balance | $ 82 |