Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2014

The following table represents the Company's fair value hierarchy for its financial assets and liabilities measured at fair value on a recurring basis (in thousands):

	Fair Value at March 31, 2014						Fair Value at December 31, 2013
	Level 1		Level 2		Level 3		Level 1		Level 2		Level 3
Assets
Auction rate security	$	―	$	―	$	-	$	1,790	$	―	$	-
Money market funds		95,977		-		-		100,049		-		-
U.S. treasury securities		-		10,000		-		-		-		-
Corporate debt securities		-		2,907		-		-		26,978		-

Total cash equivalents and investments	$	95,977	$	12,907	$	-	$	101,839	$	26,978	$	-