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Debt (Tables)

9 Months Ended

Sep. 30, 2015

Debt at September 30, 2015, consisted of the following (in thousands):


		September 30, 2015
		Principal				Unamortized Discount				Total
Loan and Security Agreement		$	20,000			$	(144	)		$	19,856
Less: debt - current			(1,512	)			63				(1,449	)

Debt - non-current		$	18,488			$	(81	)		$	18,407

Debt at December 31, 2014, consisted of the following (in thousands):


		December 31, 2014
		Principal				Unamortized Discount				Total
Loan and Security Agreement		$	10,000			$	(128	)		$	9,872
Less: debt - current			—				—				—

Debt - non-current		$	10,000			$	(128	)		$	9,872

Expected Principal and Interest Payments on Debt

Principal and interest payments on debt at September 30, 2015, are expected to be as follows * (in thousands):


Year ended December 31,		Principal				Interest				Total
2015		$	—			$	349			$	349
2016			3,050				1,352				4,402
2017			6,428				980				7,408
2018			6,892				517				7,409
2019			3,630				1,474				5,104

Total		$	20,000			$	4,672			$	24,672

*	Unless interest only period extends to December 31, 2016, as described below.