Debt (Tables)

9 Months Ended

Sep. 30, 2019

Debt Disclosure [Abstract]

Schedule of Annual Principal and Interest Payments Due Under Term Loan

As of September 30, 2019, annual principal and interest payments due under the 2019 term loan were as follows: 

Year	Aggregate Minimum Payments (in thousands)
2019		679
2020		2,745
2021		14,611
2022		14,816
2023		13,903
Thereafter		3,018
Total	$	49,772
Less interest		(7,872	)
Less unamortized portion of final payment		(1,830	)
Total	$	40,070

Summary of Carrying Value of Convertible Notes

The table below summarizes the carrying value of the 2024 Convertible Notes as of September 30, 2019:

	(in thousands)
Gross proceeds	$	201,250
Portion of proceeds allocated to equity component (additional    paid-in capital)		(64,541	)
Debt issuance costs		(6,470	)
Portion of issuance costs allocated to equity component    (additional paid-in capital)		2,075
Amortization of debt discount and debt issuance costs		18,890
Carrying value 2024 Convertible Notes	$	151,204