Convertible 3.75% Senior Notes (Tables)

3 Months Ended

Mar. 31, 2018

At March 31, 2018 and December 31, 2017, the net carrying amount of the 2019 Notes and the remaining unamortized debt discount were as follows (in thousands):



	March 31, 2018		December 31, 2017
	(Unaudited)		(Audited)
Face amount of the 2019 Notes	$	143,750	$	143,750
Unamortized discount	18,178		20,517
Debt issuance costs	$	2,001	$	2,256
Carrying amount of the 2019 Notes	$	123,571	$	120,977

Interest Income and Interest Expense Disclosure

For the three months ended March 31, 2018 and 2017, the Company recorded the following expenses in relation to the 2019 Notes (in thousands):



	Three months ended March 31,
	2018		2017
Interest Expense at 3.75% coupon rate	$	1,348	$	1,348
Debt discount amortization	2,339		2,057
Amortization of deferred financing costs	255		224
Total interest expense (1)	$	3,942	$	3,629

(1) Included within "Interest and other expense, net" on the Condensed Consolidated Statements of Operations, offset by interest income and capitalized interest