Sales and Marketing Support Accrual Activity (Detail) (Allowance for Promotions, USD $) In Thousands, unless otherwise specified	12 Months Ended
Mar. 31, 2014	Mar. 31, 2013
Allowance for Promotions
Valuation and Qualifying Accounts Disclosure [Line Items]
Beginning Balance	$ 1,152	$ 1,961
additions	1,529	2,060
usages	(1,883)	(1,991)
adjustments	(328)	(878)
Ending Balance	$ 470	$ 1,152

Total of allowances and reserves, the valuation and qualifying accounts that are either netted against the cost of an asset (in order to value it at its carrying value) or that reflect a liability established to represent expected future costs.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section S99

-Paragraph 4

-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 09

-Article 12

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