Cash, Cash Equivalents and Marketable Securities (Tables)

3 Months Ended

Mar. 31, 2016

Cash Cash Equivalents And Short Term Investments [Abstract]

Summary of Cash, Cash Equivalents and Marketable Securities Available-for-Sale

The following is a summary of cash, cash equivalents and marketable securities available-for-sale as of March 31, 2016 and December 31, 2015 (in thousands):

	Amortized Cost		Unrealized Gains		Unrealized Losses			Estimated Fair Value
March 31, 2016
Cash and cash equivalents:
Cash	$	6,030	$	-	$	-		$	6,030
Money market funds		24,982		-		-			24,982
U.S. Government agency securities		4,999		-		-			4,999
Corporate debt securities		2,847		-		-			2,847
Total cash and cash equivalents		38,858		-		-			38,858
Marketable securities available-for-sale:
U.S. Treasuries		6,573		2		(1	)		6,574
U.S. Government agency securities		24,604		8	-				24,612
Corporate debt securities		96,691		112	-				96,803
Total marketable securities available-for-sale		127,868		122		(1	)		127,989
Total cash, cash equivalents and marketable securities	$	166,726	$	122	$	(1	)	$	166,847
December 31, 2015
Cash and cash equivalents:
Cash	$	4,561	$	-	$	-		$	4,561
Money market funds		21,193		-		-			21,193
Corporate debt securities		19,052		7		(1	)		19,058
Total cash and cash equivalents		44,806		7		(1	)		44,812
Marketable securities available-for-sale:
U.S. Government agency securities		17,628		-		(6	)		17,622
Corporate debt securities		133,679		71		(59	)		133,691
Total marketable securities available-for-sale		151,307		71		(65	)		151,313
Total cash, cash equivalents and marketable securities	$	196,113	$	78	$	(66	)	$	196,125

Maturities of Marketable Securities Available-for-Sale

The maturities of our marketable securities available-for-sale are as follows (in thousands):

	March 31, 2016
	Amortized Cost		Estimated Fair Value
Mature in one year or less	$	127,868	$	127,989
Mature after one year through two years		-		-
	$	127,868	$	127,989