Long-Term Debt (Tables)

9 Months Ended

Sep. 30, 2019

Debt Disclosure [Abstract]

Summary of Long Term Debt

Long-term debt consisted of the following:

(in thousands)	September 30, 2019		December 31, 2018
Principal amount of long-term debt	$	20,000	$	10,000
Less: Current portion of long-term debt	—		(1,687)
Long-term debt, net of current portion	20,000		8,313
Debt discount, net of accretion	(317)		(226)
Cumulative accretion of final payment due at maturity	303		58
Long-term debt, including accretion, net of current portion	$	19,986	$	8,145

Schedule of Future Principal Payments and the Final Payments Due

As of September 30, 2019, future principal payments and the final payment due under the Company’s loan agreements were as follows (in thousands):

Year Ending December 31,	Total
2019	—
2020	$	—
2021	—
2022	11,897
2023	8,103
Long-term debt	$	20,000