Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2016

Fair Value Disclosures [Abstract]

Schedule of fair value of financial instruments

measured at fair value on a recurring basis by level within the fair value hierarchy:

	December 31,				Valuation
	2016		2015		Technique
Common stock warrant liability	$	69	$	63	C
Convertible notes payable – current liability	$	—	$	—	C

Schedule of Level 3 financial liabilities

The following table sets forth a summary of the changes in the fair value of the Company’s Level 3 financial liabilities:

		Common		2014/2015
		Stock		Convertible
		Warrant		Notes
		Liability		Payable
Balance at December 31, 2014		—		447
Issuance of common stock warrant		53		—
Issuance of convertible notes		—		1,818
Change in fair value(1)		10		728
Extinguishment of convertible notes for Series B convertible preferred stock		—		(2,993	)
Balance at December 31, 2015	$	63	$	—
Change in fair value		6		—
Balance at December 31, 2016	$	69	$	—

(1) The change in the fair value of the common stock warrant and convertible notes payable was recorded as an increase to other income (expense) and interest expense of $677 and $63, respectively, in the statements of operations and comprehensive loss