FAIR VALUE MEASUREMENTS (Tables)

12 Months Ended

Mar. 31, 2015

FAIR VALUE MEASUREMENTS

Schedule of financial assets measured at fair value on recurring basis, based on the fair value hierarchy

(In thousands)	March 31, 2015		March 31, 2014
Level 1 — Financial Assets
Money market funds	$	51,784	$	33,623
Treasury bills	5,403		17,722
Total Level 1 Financial Assets	57,187		51,345
Level 2 — Financial Assets
Corporate debentures/bonds	13,813		41,424
Commercial paper	—		6,193
Government agency bonds	5,317		26,660
Total Level 2 Financial Assets	19,130		74,277
Total cash equivalents and short-term investments	$	76,317	$	125,622

Schedule of available-for-sale securities

	Amortized  Cost		Gross Unrealized  Gains		Gross Unrealized Losses			Fair Value
2015:
Short-term investments:
Corporate debentures/bonds	$	13,823	$	—	$	(10	)	$	13,813
Government agency bonds	5,315		2		—			5,317
Treasury bills	5,400		3		—			5,403
Total short-term investments	$	24,538	$	5	$	(10	)	$	24,533
Cash equivalents:
Money market funds	$	51,784	$	—	$	—		$	51,784
Total cash equivalents	$	51,784	$	—	$	—		$	51,784

	Amortized  Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
2014:
Short-term investments:
Corporate debentures/bonds	$	38,076	$	9	$	(11	)	$	38,074
Commercial paper	6,193		—		—			6,193
Government agency bonds	26,652		10		(2		)	26,660
Treasury bills	17,708		14		—			17,722
Total short-term investments	$	88,629	$	33	$	(13	)	$	88,649
Cash equivalents:
Money market funds	$	33,623	$	—	$	—		$	33,623
Corporate debentures/bonds	3,350		—		—			3,350
Total cash equivalents	$	36,973	$	—	$	—		$	36,973