Long-term Debt (Tables)

12 Months Ended

Dec. 31, 2015

Long-Term Debt

Long-term debt consisted of the following at December 31, 2015 and 2014:

In thousands	2015			2014
Convertible notes, net	$	164,438		$	156,154
Royalty financing, net		46,921			—
Facility lease obligation		231,733			196,027
		443,092			352,181
Less current portion		(13,872	)		(6,707	)
Long term portion	$	429,220		$	345,474

Outstanding Convertible Note Balances

The outstanding convertible note balances as of December 31, 2015 and 2014 consisted of the following:

In thousands	2015			2014
Liability component:
Principal	$	200,000		$	200,000
Less: debt discount and unamortized debt issuance costs		(35,562	)		(43,846	)
Net carrying amount	$	164,438		$	156,154
Equity component	$	40,896		$	40,896

Interest Expense Related to Convertible Notes

The following table sets forth total interest expense recognized related to the convertible notes during the years ended December 31, 2015 and 2014:

In thousands	2015		2014
Contractual interest expense	$	7,250	$	3,887
Amortization of debt discount		8,141		4,058
Amortization of debt issuance cost		142		71
	$	15,533	$	8,016