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Fair Value Measurements - Narrative (Details) $ in Thousands | 6 Months Ended |
--- | --- | ---
Jun. 30, 2020 USD ($) | Feb. 17, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Impact of 10% change in estimate of expected volatility of the fair value of the common stock | $ 33 |
Impact of 10% change in the estimate of fair value of the common stock | $ 59 |
Warrant Liability | Preferred Stock | Expected term |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Warrant liability, measurement input, term |  | 2 years
Warrant Liability | Preferred Stock | Risk-free interest rate |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Common stock warrant liability, measurement input |  | 0.0153
Warrant Liability | Preferred Stock | Expected volatility |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Common stock warrant liability, measurement input |  | 0.7897
Warrant Liability | Preferred Stock | Expected dividend yield |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Common stock warrant liability, measurement input |  | 0

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