INDEBTEDNESS (Tables)

6 Months Ended

Jun. 30, 2015

Debt Disclosure [Abstract]

Convertible Debt

The carrying value of the Notes is as follows as of June 30:

(in thousands)	2015
Principal amount	$	143,750
Unamortized debt discount		(30,078)
Net carrying value	$	113,672

Interest Income and Interest Expense Disclosure

The following table sets forth the components of total interest expense related to the Notes recognized in the accompanying consolidated statements of operations for the three and six-months ended June 30, 2015:

	Three months ended		Six months ended
(in thousands)	June 30, 2015		June 30, 2015
Contractual coupon	$	1,078	$	2,156
Amortization of debt discount		1,501		2,981
Amortization of finance fees		211		422
Capitalized interest		(6)		(15)
	$	2,784	$	5,544