Fair Value of Financial Assets and Liabilities (Tables)

3 Months Ended

Mar. 31, 2017

Fair Value of Financial Assets and Liabilities

Summary of the Company's financial assets and liabilities measured at fair value on a recurring basis and indicate the level of the fair value hierarchy

	Fair Value Measurements as of
	March 31, 2017 Using:
	Level 1		Level 2		Level 3		Total
Liabilities:
Warrant liability	$	—	$	—	$	1,234	$	1,234
Derivative liability	—		—		223		223
Contingent equity liability	—		—		22,313		22,313
	$	—	$	—	$	23,770	$	23,770

	Fair Value Measurements as of
	December 31, 2016 Using:
	Level 1		Level 2		Level 3		Total
Liabilities:
Warrant liability	$	—	$	—	$	780	$	780
Derivative liability	—		—		512		512
Contingent equity liability	—		—		18,938		18,938
	$	—	$	—	$	20,230	$	20,230

Summary of roll forward of aggregate fair values of the Company's warrant liability, derivative liability and contingent equity liability

	Warrant		Derivative			Contingent
	Liability		Liability			Equity Liability
Balance at December 31, 2016	$	780	$	512		$	18,938
Change in fair value	454		(289		)	3,375
Balance at March 31, 2017	$	1,234	$	223		$	22,313