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Cash, Cash Equivalents and Investments (Tables)

3 Months Ended

Jun. 30, 2015

Cash, cash equivalents, and available-for-sale investments were (in thousands):

				Gross		Gross				Cash and
		Amortized		Unrealized		Unrealized		Estimated		Cash		Short-Term
As of June 30, 2015		Costs		Gain		Loss		Fair Value		Equivalents		Investments
Cash	$	12,466		-	$	-	$	12,466	$	12,466	$	-
Level 1:
Money market funds		16,832		-		-		16,832		16,832		-
Mutual funds		2,000		-		(139)		1,861		-		1,861
Subtotal		31,298		-		(139)		31,159		29,298		1,861
Level 2:
Commercial paper		9,783		2		(1)		9,784		-		9,784
Corporate debt		72,828		38		(29)		72,837		-		72,837
Municipal securities		6,471		2		(1)		6,472		-		6,472
Asset backed securities		23,427		5		(8)		23,424		-		23,424
Mortgage backed securities		5,000		1		(23)		4,978		-		4,978
Agency bond		7,509		2		(2)		7,509		-		7,509
International government securities		800		3		-		803		-		803
Subtotal		125,818		53		(64)		125,807		-		125,807
Total	$	157,116	$	53	$	(203)	$	156,966	$	29,298	$	127,668

				Gross		Gross				Cash and
		Amortized		Unrealized		Unrealized		Estimated		Cash		Short-Term
As of March 31, 2015		Costs		Gain		Loss		Fair Value		Equivalents		Investments
Cash	$	24,734	$	-	$	-	$	24,734	$	24,734	$	-
Level 1:
Money market funds		28,376		-		-		28,376		28,376		-
Mutual funds		2,000		-		(107)		1,893		-		1,893
Subtotal		55,110		-		(107)		55,003		53,110		1,893
Level 2:
Commercial paper		9,043		1		-		9,044		-		9,044
Corporate debt		75,284		57		(10)		75,331		-		75,331
Municipal securities		5,435		2		(1)		5,436		-		5,436
Asset backed securities		21,503		4		(5)		21,502		-		21,502
Mortgage backed securities		5,822		-		(52)		5,770		-		5,770
Agency bond		4,201		3		-		4,204		-		4,204
International government securities		800		4		-		804		-		804
Subtotal		122,088		71		(68)		122,091		-		122,091
Total	$	177,198	$	71	$	(175)	$	177,094	$	53,110	$	123,984

Contractual maturities of cash equivalents and investments as of June 30, 2015 are set forth below (in thousands):