Fair Value of Financial Assets and Liabilities (Tables)

3 Months Ended

Mar. 31, 2019

Schedule of Assets and Liabilities Measured at Fair Value

The following tables present information about the Company’s financial assets and liabilities measured at fair value on a recurring basis and indicate the level of the fair value hierarchy used to determine such fair values:


	Fair Value Measurements as of March 31, 2019 Using:
	Level 1		Level 2		Level 3		Total
Assets:
Cash equivalents—money market funds	$	—	$	22,299	$	—	$	22,299

	$	—	$	22,299	$	—	$	22,299

Liabilities:
Preferred stock warrant liability	$	—	$	—	$	—	$	—
Derivative liability		—		—		18	$	18

	$	—	$	—	$	18	$	18


	Fair Value Measurements as of December 31, 2018 Using:
	Level 1		Level 2		Level 3		Total
Assets:
Cash equivalents—money market fund	$	—	$	8,134	$	—	$	8,134

	$	—	$	8,134	$	—	$	8,134

Liabilities:
Preferred stock warrant liability	$	—	$	—	$	4,947	$	4,947
Derivative liability		—		—		201	$	201

	$	—	$	—	$	5,148	$	5,148

Summary of Aggregate Fair Values of Warrant Liability and Derivative Liability and Preferred Stock Repurchase Liability

The following table provides a roll-forward of the aggregate fair values of the Company’s warrant liability, derivative liability and preferred stock repurchase liability, for which fair values are determined using Level 3 inputs:


	Preferred Stock Warrant Liability			Derivative Liability
Balance as of December 31, 2018	$	4,947		$	201
Change in fair value		288			(183	)
Conversion of convertible preferred stock warrant into common stock warrant in connection with Merger		(5,235	)		—

Balance as of March 31, 2019	$	—		$	18