Debt (Tables)

9 Months Ended

Sep. 30, 2012

Debt [Abstract]

Summary of Long-term debt

Long-term debt consists of the following (in thousands):

	September 30, 2012		December 31, 2011
Convertible notes	$	—	$	91,875
Less unamortized debt discount		—		(5,450	)
		—		86,425
Less current portion		—		(86,425	)
Total long-term debt	$	—	$	—

Interest expense on convertible notes

Interest expense relating to the Company’s convertible notes for the three and nine months ended September 30, 2012 and 2011 is as follows (in thousands):

	Three Months Ended September 30,				Nine Months Ended September 30,
	2012		2011		2012		2011
Interest expense at coupon rate (6.0%)	$	—	$	1,422	$	2,756	$	4,347
Non-cash interest in accordance with ASC 470		—		2,488		5,450		7,133
Total interest expense recognized on convertible debt instruments	$	—	$	3,910	$	8,206	$	11,480