Debt (Tables)

3 Months Ended

Mar. 31, 2017

Debt Disclosure [Abstract]

Debt

Debt at March 31, 2017, consisted of the following (in thousands):

	March 31, 2017
	Principal			Unamortized Discount			Total
Loan and Security Agreement	$	18,257		$	(100	)	$	18,157
Less: debt - current		(7,763	)		70			(7,693	)
Debt - non-current	$	10,494		$	(30	)	$	10,464

Debt at December 31, 2016, consisted of the following (in thousands):

	December 31, 2016
	Principal			Unamortized Discount			Net Carrying Value
Loan and Security Agreement	$	19,499		$	(124	)	$	19,375
Less: debt - current		(7,013	)		79			(6,934	)
Debt - non-current	$	12,486		$	(45	)	$	12,441

Expected Principal and Interest Payments on Debt

Principal and interest payments on debt at March 31, 2017, are expected to be as follows (in thousands):

Year ended December 31,	Principal		Interest		Total
2017	$	5,771	$	823	$	6,594
2018		8,178		613		8,791
2019		4,308		1,488		5,796
Total	$	18,257	$	2,924	$	21,181