Fair Value Measurements Cash, cash equivalents and marketable securities (Tables)

6 Months Ended

Sep. 30, 2014

Cash, cash equivalents and marketable securities [Abstract]

Cash, Cash Equivalents, and Short-term Investments [Text Block]

Our cash equivalents consist of highly liquid investments with original maturity dates of three months or less and can include certificates of deposit, commercial paper, treasury bills, money market funds and other investments. The fair value of our marketable securities, comprised of commercial paper, corporate bonds and certificates of deposit, was determined using a market approach, based on prices and other relevant information generated by market transactions involving similar assets, and therefore, is classified within Level 2 of the fair value hierarchy. Our marketable securities consist of investments with original maturity dates of 90 to 365 days and are classified as available for sale.

The following data summarizes our cash equivalents and marketable securities:

	September 30, 2014
	Amortized		Unrealized		Unrealized		Fair		Cash		Marketable
(In thousands)	cost basis		gains		losses		value		equivalents		securities
Level 2:
Commercial paper	$	2,999	$	—	$	—	$	2,999	$	2,999	$	—
Certificates of deposit	5,006		—		—		5,006		—		5,006
Corporate bonds	5,076		—		5		5,071		—		5,071
Total	$	13,081	$	—	$	5	$	13,076	$	2,999	$	10,077

	March 31, 2014
	Amortized		Unrealized		Unrealized		Fair		Cash		Marketable
(In thousands)	cost basis		gains		losses		value		equivalents		securities
Level 2:
Commercial paper	$	19,993	$	—	$	—	$	19,993	$	19,993	$	—
Certificates of deposit	9,006		—		—		9,006		9,006		—
Total	$	28,999	$	—	$	—	$	28,999	$	28,999	$	—

Cash, cash equivalents and marketable securities [Table Text Block]

The following data summarizes our cash equivalents and marketable securities:

	September 30, 2014
	Amortized		Unrealized		Unrealized		Fair		Cash		Marketable
(In thousands)	cost basis		gains		losses		value		equivalents		securities
Level 2:
Commercial paper	$	2,999	$	—	$	—	$	2,999	$	2,999	$	—
Certificates of deposit	5,006		—		—		5,006		—		5,006
Corporate bonds	5,076		—		5		5,071		—		5,071
Total	$	13,081	$	—	$	5	$	13,076	$	2,999	$	10,077

	March 31, 2014
	Amortized		Unrealized		Unrealized		Fair		Cash		Marketable
(In thousands)	cost basis		gains		losses		value		equivalents		securities
Level 2:
Commercial paper	$	19,993	$	—	$	—	$	19,993	$	19,993	$	—
Certificates of deposit	9,006		—		—		9,006		9,006		—
Total	$	28,999	$	—	$	—	$	28,999	$	28,999	$	—