Long-Term Obligations (Tables)

12 Months Ended

Dec. 31, 2011

Long-Term Obligations

Schedule of long-term obligations

	December 31, 2011				December 31, 2010
(in thousands)	Carrying value		Estimated fair value		Carrying value		Estimated fair value
Convertible subordinated notes	$	172,500	$	189,588	$	172,500	$	202,391
Note payable to lessor		—		—		42		42

Schedule of capital lease agreement

	Year Ended December 31,
(in thousands)	2011			2010
Obligation of lease arrangement	$	79		$	130
Minimum lease payments less interest		(52	)		(51	)
Present value of future payments		27			79
Less current portion		(27	)		(52	)
Long-term portion	$	—		$	27