Debt (Tables)

6 Months Ended

Jun. 30, 2017

Debt Disclosure [Abstract]

Schedule of Annual Principal and Interest Payments Due Under Term Loan

As of June 30, 2017, annual principal and interest payments due under the 2015 term loan are as follows: 

Year	Aggregate Minimum Payments (in thousands)
2017	$	5,781
2018		11,082
2019		10,448
2020		4,383
Total	$	31,694
Less interest		(1,443	)
Less final payment		(2,700	)
Total	$	27,551

Summary of Carrying Value of Convertible Notes

The table below summarizes the carrying value of the 2024 Convertible Notes as of June 30, 2017:

	(in thousands)
Gross proceeds	$	201,250
Portion allocated to equity (additional paid-in capital)		(64,541	)
Debt issuance costs		(6,470	)
Portion allocated to equity (additional paid-in capital)		2,075
Amortization of debt discount and debt issuance costs		1,170
Carrying value 2024 Convertible Notes	$	133,484