Debt (Tables)

9 Months Ended

Sep. 30, 2019

Debt

Schedule of estimated future principal payments due

As of September 30, 2019, the estimated future principal payments due were as follows (in thousands):

Year ending December 31,
2019 (three months ending December 31)	$	—
2020		—
2021		—
2022		25,000
Thereafter		25,000
	$	50,000