Borrowings (Tables)

12 Months Ended

Dec. 31, 2016

Debt Disclosure [Abstract]

Schedule of Future Minimum Payments under the Loans Payable

Future minimum payments under outstanding borrowings as of December 31, 2016 are as follows:

(in thousands)	Convertible Notes			2022 Notes
2017	$	2,736		$	20,125
2018		2,736			20,125
2019		2,736			62,617
2020		63,527			57,586
2021 and thereafter		—			100,078
Total		71,735			260,531
Less interest		(10,943	)		(85,531	)
Less unamortized discount		(13,842	)		(5,089	)
Less current portion		—			—
Long-term debt	$	46,950		$	169,911