FAIR VALUE MEASUREMENTS (Tables)

12 Months Ended

Mar. 31, 2014

Fair Value Disclosures [Abstract]

Schedule of Financial Assets and Liabilities

The following tables present the Company’s financial assets and liabilities measured on a recurring basis using the fair value hierarchy as of March 31, 2014 and 2013 (in thousands). The Company has revised the level designation for certain prior year investments to correct an immaterial misstatement.

	Fair Value Measurements at
	March 31, 2014
	Level 1		Level 2			Level 3			Total
ASSETS:
Cash and cash equivalents	$	82,079	$	19,997		$	—		$	102,076
U.S. government and municipal obligations	21,992		69,765			—			91,757
Commercial paper	—		14,581			—			14,581
Corporate bonds	10,380		—			—			10,380
Certificate of deposits	—		—			—			—
Derivative financial instruments	—		368			—			368
	$	114,451	$	104,711		$	—		$	219,162
LIABILITIES:
Contingent consideration	$	—	$	—		$	(4,291	)	$	(4,291	)
Contingent contractual non-compliance liability	—		—			(49		)	(49		)
Derivative financial instruments	—		(139		)	—			(139		)
	$	—	$	(139	)	$	(4,340	)	$	(4,479	)

	Fair Value Measurements at
	March 31, 2013
	Level 1		Level 2			Level 3			Total
ASSETS:
Cash and cash equivalents	$	99,930	$	—		$	—		$	99,930
U.S. government and municipal obligations	19,288		12,357			—			31,645
Commercial paper	—		12,390			—			12,390
Corporate bonds	5,166		—			—			5,166
Certificate of deposits	—		4,960			—			4,960
Derivative financial instruments	—		71			—			71
	$	124,384	$	29,778		$	—		$	154,162
LIABILITIES:
Contingent consideration	$	—	$	—		$	(5,087	)	$	(5,087	)
Contingent contractual non-compliance liability	—		—			(246		)	(246		)
Derivative financial instruments	—		(249		)	—			(249		)
	$	—	$	(249	)	$	(5,333	)	$	(5,582	)

Reconciliation of Changes in Fair Value of Level III Financial Assets

The following table sets forth a reconciliation of changes in the fair value of the Company’s Level 3 financial assets for the year ended March 31, 2013 (in thousands):

	Auction Rate Securities			Contingent Purchase Consideration			Contingent Contractual Non-compliance Liability
Balance at March 31, 2012	$	1,461		$	(8,213	)	$	(700	)
(Increase) / decrease in fair value and accretion expense (included within research and development expense)	—			(912		)	184
ARSs redeemed by issuers at par	(1,650		)	—			—
Unrealized gains included in accumulated other comprehensive income	190			—			—
Unrealized gain (loss) included in earnings	(1		)	—			—
Payments	—			4,038			270
Balance at March 31, 2013	$	—		$	(5,087	)	$	(246	)

The following table sets forth a reconciliation of changes in the fair value of the Company’s Level 3 financial liabilities for the year ended March 31, 2014 (in thousands):

	Contingent Purchase Consideration			Contingent Contractual Non-compliance Liability
Balance at March 31, 2013	$	(5,087	)	$	(246	)
(Increase) / decrease in fair value and accretion expense (included within research and development expense)	(45		)	197
Payments	841			—
Balance at March 31, 2014	$	(4,291	)	$	(49	)