Debt (Tables)

12 Months Ended

Dec. 31, 2016

Debt Disclosure [Abstract]

Debt

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

Debt at December 31, 2015, consisted of the following (in thousands):

	December 31, 2015
	Principal			Unamortized Discount			Total
Loan and Security Agreement	$	20,000		$	(196	)	$	19,804
Less: debt - current		(3,050	)		94			(2,956	)
Debt - non-current	$	16,950		$	(102	)	$	16,848

Expected Principal and Interest Payments on Debt

Principal and interest payments on debt at December 31, 2016, are expected to be as follows:

Year ended December 31,	Principal		Interest		Total
2017		7,013		1,160		8,173
2018		8,178		613		8,791
2019		4,308		1,488		5,796
Total	$	19,499	$	3,261	$	22,760