Fair Value Measurements (Tables)

6 Months Ended

Jun. 30, 2019

Fair Value Disclosures [Abstract]

Fair value measurements using significant unobservable inputs

The table below presents the activity within Level 3 of the fair value hierarchy for the six months ended June 30, 2019

Fair Value Measurements Using Significant Unobservable Inputs (Level 3)

(in thousands)	Warrant Liability
Balance at December 31, 2018	$	33
Total change in the liability included in earnings		(17	)
Reclass from liability to equity		(7	)
Balance at June 30, 2019	$	9

Schedule of fair value of the warrants

The fair value of the February 2018 Warrants at June 30, 2019 and December 31, 2018 was determined by using option pricing models with the following assumptions:

	June 30,		December 31,
	2019		2018
Expected life (in years)		4.50	1.13 - 5.11
Expected volatility	163.6%		145.7% - 265.3%
Risk-free interest rates	1.8%		2.5% - 2.6%

Assets and liabilities measured at fair value on a recurring basis

The table below presents the Company’s assets and liabilities measured at fair value on a recurring basis as of June 30, 2019, aggregated by the level in the fair value hierarchy within which those measurements fall in accordance with ASC 820.

	Assets and Liabilities Measured at Fair Value on a Recurring Basis
(in thousands)	Level 1				Level 2				Level 3				Total
	June 30, 2019		December 31, 2018		June 30, 2019		December 31, 2018		June 30, 2019		December 31, 2018		June 30, 2019		December 31, 2018
Liabilities
Derivative instrument liabilities	$	—	$	—	$	—	$	—	$	9	$	33	$	9	$	33