Debt (Tables)

3 Months Ended

Mar. 31, 2019

Debt Disclosure [Abstract]

Summary of Composition of Debt

The following table presents the composition of debt as of March 31, 2019 and December 31, 2018 (in thousands):

	March 31, 2019			December 31, 2018
Outstanding principal	$	30,000		$	30,000
Accrued final payment fees		1,555			1,468
Less debt discounts		(983	)		(1,073	)
Long-term debt, net	$	30,572		$	30,395

Summary of Future Principal Payments

Based on a 24-month amortization of the outstanding principal amounts of the Term A and Term B Loans beginning on April 1, 2020 as discussed above, the following table sets forth by year the Company’s required future principal payments (in thousands):

Year:	Principal Payments
2019	$	-
2020		11,250
2021		15,000
2022		3,750
Total principal payments	$	30,000