Debt (Tables)

6 Months Ended

Jun. 30, 2016

Debt Disclosure [Abstract]

Debt

Debt consisted of the following (in thousands):

	June 30, 2016
	Principal			Unamortized Discount			Total
Loan and Security Agreement	$	20,000		$	(147	)	$	19,853
Less: debt - current		(6,208	)		81			(6,127	)
Debt - non-current	$	13,792		$	(66	)	$	13,726

	December 31, 2015
	Principal			Unamortized Discount			Net Carrying Value
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 June 30, 2016, are expected to be as follows (in thousands):

Year ended December 31,	Principal		Interest		Total
2016	$	3,050	$	654	$	3,704
2017		6,428		980		7,408
2018		6,892		517		7,409
2019		3,630		1,474		5,104
Total	$	20,000	$	3,625	$	23,625