Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2017

Fair Value Disclosures [Abstract]

Schedule of assets and liabilities measured at fair value on a recurring basis

Assets and liabilities measured at fair value on the Company’s balance sheet on a recurring basis include the following at March 31, 2017 and December 31, 2016 (in thousands):

Warrant Liability	Level 1	Level 2	Level 3
March 31, 2017	—	—	$	1,564
December 31, 2016	—	—	$	1,226

Schedule of reconciliation of warrant 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):

	Three Months Ended March 31,
	2017		2016
Balance at beginning of period	$	1,226	$	3,072
Issuance of common stock warrants	—		—
Exercise of common stock warrants	—		(739		)
Remeasurement of common stock warrants	338		(796		)
Balance at end of period	$	1,564	$	1,537