Long-Term Debt (Tables)

3 Months Ended

Mar. 31, 2019

Debt Disclosure [Abstract]

Interest Expense and Amortization of Debt Issuance Costs and Discounts

Amortization of debt issuance costs and discounts are included in interest expense. Interest expense in the condensed consolidated statements of operations and comprehensive income (loss) relates to the following debt instruments (in thousands):

	Three Months Ended March 31,
	2019		2018
Novartis note	$	186	$	139
SVB loan		242		—
Other		1		31
Total interest expense	$	429	$	170