State Net Operating Loss (Detail) (States, USD $) In Millions, unless otherwise specified	12 Months Ended
	Mar. 31, 2014
Deferred Tax Assets, Net Operating Losses, Capital Losses, and Tax Credits Carryforwards [Line Items]
Operating loss carryforwards, amount	$ 3.7
Fiscal Year 2008
Deferred Tax Assets, Net Operating Losses, Capital Losses, and Tax Credits Carryforwards [Line Items]
Operating loss carryforward, origination year	2008
Operating loss carryforwards, amount	1.3
Operating loss carryforwards, expiration year	2018
Fiscal Year 2014
Deferred Tax Assets, Net Operating Losses, Capital Losses, and Tax Credits Carryforwards [Line Items]
Operating loss carryforward, origination year	2014
Operating loss carryforwards, amount	$ 2.4
Operating loss carryforwards, expiration year	2034