Fair Value Measurements (Tables)

6 Months Ended

Jun. 30, 2019

Schedule of Assumptions used to Estimate Fair Value of Warrant Liability

The following weighted-average assumptions were used to estimate the fair value of the common stock warrant liability at June 30, 2019:



	June 30, 2019
Expected term	1.8 years
Risk-free interest rate	1.78	%
Expected volatility	95.25	%
Expected dividend yield	—	%

Reconciliation of Liabilities Measured at Fair Value on a Recurring Basis

The following is a reconciliation of the Company’s liabilities measured at fair value on a recurring basis using unobservable inputs (Level 3) for the six months ended June 30, 2019:



	Fair Value Measurements Using Significant Unobservable Inputs (Level 3)
	Common Stock Warrant Liability
Balance at January 1, 2019	$	797
Gain included in other income (expense), net	(256		)
Balance at June 30, 2019	$	541