Debt (Tables)

3 Months Ended

Mar. 31, 2019

Debt Disclosure [Abstract]

Debt

Debt at March 31, 2019, consisted of the following (in thousands):

	March 31, 2019
	Principal		Unamortized Discount			Total
Term Loan Credit Agreement	$	40,000	$	(567	)	$	39,433
Less: debt – current		—		—			—
Debt – non-current	$	40,000	$	(567	)	$	39,433

Debt at December 31, 2018, consisted of the following (in thousands):

	December 31, 2018
	Principal			Unamortized Discount			Net Carrying Value
Oxford Term Loan Agreement	$	30,000		$	(130	)	$	29,870
Less: debt – current		(7,857	)		—			(7,857	)
Debt – non-current	$	22,143		$	(130	)	$	22,013

Expected Principal, Interest and Fee Payments on Debt

Principal, interest and fee payments on debt at March 31, 2019, are expected to be as follows (in thousands):

Year ended December 31,	Principal		Interest and Fees		Total
2019	$	—	$	2,250	$	2,250
2020		—		3,335		3,335
2021		—		3,326		3,326
2022		15,000		2,909		17,909
2023		20,000		1,315		21,315
2024		5,000		1,270		6,270
Total	$	40,000	$	14,405	$	54,405