Fair Value Measurement (Tables)

3 Months Ended

Mar. 31, 2013

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 March 31, 2013 and December 31, 2012 (in thousands):

As of March 31, 2013:		Level 1		Level 2		Level 3		Total
Marketable investment securities	$	62,432	$	8,651	$	-	$	71,083

As of December 31, 2012:		Level 1		Level 2		Level 3		Total
Marketable investment securities	$	67,723	$	15,521	$	-	$	83,244

Fair and Carrying Value of Debt Instruments

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

		As of March 31, 2013				As of December 31, 2012
		Fair		Carrying		Fair		Carrying
		Value		Value		Value		Value
5.75% Convertible Notes	$	31,241	$	16,545	$	28,131	$	16,545
Sensipar Notes		73,090		73,982		79,129		80,234
Preotact-Secured Debt		29,324		42,790		28,605		42,816
Regpara-Secured Debt		41,639		36,252		48,887		36,252
Total	$	175,294	$	169,569	$	184,752	$	175,847