Convertible Senior Notes (Tables)

3 Months Ended

Mar. 31, 2016

Debt Disclosure [Abstract]

Carrying Value of 2018 Convertible Notes

The carrying value of the 2018 Convertible Notes as of March 31, 2016 is summarized as follows:

Principal amount	$	120,000
(Less): Unamortized debt discount (amortized through December 2018)	(17,067		)
(Less): Debt issuance costs (see Note 3(d))	(2,000		)
March 31, 2016 carrying value	$	100,933

Components of the Interest Expense Recognized

The following table sets forth the components of interest expense recognized in the accompanying Condensed Consolidated Statements of Operations for the 2018 Convertible Notes for the three months ended March 31, 2016:

Contractual coupon interest expense	$	825
Amortization of debt issuance costs	171
Accretion of debt discount	1,385
Total	$	2,381
Effective interest rate	8.66		%