December 31,
2019
Principal amount of long-term debt
$
10,000
Unamortized debt discount
(261)
Long-term debt, net of discount
9,739
Future payments of long-term debt, as of December 31, 2019 are as follows (fiscal years):
2021
—
2022
527
2023
6,558
2024
2,915
Total debt payments