Long-Term Debt (Tables)

9 Months Ended

Sep. 30, 2020

Debt Disclosure [Abstract]

Summary of Long Term Debt

Long-term debt consisted of the following:

(in thousands)	September 30, 2020		December 31, 2019
Principal amount of long-term debt	$	25,000	$	20,000
Debt discount, net of accretion	229		(317)
Cumulative accretion of final payment due at maturity	308		414
Long-term debt, including accretion	$	25,537	$	20,097

Schedule of Future Principal Payments and the Final Payments Due

As of September 30, 2020, future principal payments and the final payment due under the Amended Loan Agreement were as follows (in thousands):

Year Ending December 31,	Total
2020	$	—
2021	—
2022	14,871
2023	10,129
Long-term debt	$	25,000