Fair Value Measurements - (Tables)

12 Months Ended

Dec. 31, 2016

Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis

Assets and liabilities measured at fair value on the Company’s balance sheet on a recurring basis include the following at December 31, 2016 and December 31, 2015 (in thousands):



Warrant Liability	Level 1	Level 2	Level 3
December 31, 2016	—	—	$	1,226
December 31, 2015	—	—	$	3,072

Schedule of Reconciliation of Warrants Liability

The following is a reconciliation of the warrant liability, included in accrued expenses and other current liabilities in the accompanying unaudited condensed consolidated balance sheets, measured at fair value using Level 3 inputs (in thousands):



	Years Ended December 31,
	2016			2015
Balance at beginning of period	$	3,072		$	1,474
Issuance of common stock warrants	858			4,215
Exercise of common stock warrants	(1,150		)	—
Gain on change in fair value	(1,554		)	(2,617		)
Balance at end of period	$	1,226		$	3,072

Schedule of Reconciliation of Embedded Derivatives

The following is a reconciliation of the embedded bifurcated derivative liability measured at fair value using significant unobservable inputs, Level 3 (in thousands):



	Years Ended
	December 31,
	2016			2015
Balance at beginning of period	$	—		$	—
Transfers in and/or out of Level 3	—			—
Initial valuation of bifurcated derivative liability	3,936			—
Extinguishment of bifurcated derivative liability	(3,936		)	—
Balance at end of period	$	—		$	—