Fair Value Measurement (Tables)

6 Months Ended

Jun. 30, 2012

Notes to Financial Statements

Fair Value Measurement (Tables)

In accordance with the fair value hierarchy described above, the following table shows the fair value of the Company's financial assets (only marketable investment securities) that are required to be measured at fair value as of June 30, 2012 and December 31, 2011 (in thousands):

As of June 30, 2012:		Level 1		Level 2		Level 3		Total
Marketable investment securities	$	66,526	$	13,158	$	-	$	79,684

As of December 31, 2011:		Level 1		Level 2		Level 3		Total
Marketable investment securities	$	50,824	$	29,008	$	-	$	79,832

Fair and Carrying Value of Debt Instruments

The fair and carrying value of our debt instruments are detailed as follows (in thousands):

		As of June 30, 2012				As of December 31, 2011
		Fair		Carrying		Fair		Carrying
		Value		Value		Value		Value
5.75% Convertible Notes	$	26,526	$	16,545	$	22,925	$	16,545
Sensipar Notes		86,933		92,343		123,655		126,799
Preotact-Secured Debt		27,590		45,510		46,750		48,301
Regpara-Secured Debt		48,840		36,252		50,244		36,252
Total	$	189,889	$	190,650	$	243,574	$	227,897