State Net Operating Loss (Detail) - States $ in Millions	12 Months Ended
	Mar. 31, 2017 USD ($)
Operating Loss Carryforwards [Line Items]
Net operating loss carry forwards, amount	$ 3.0
Fiscal Year 2014
Operating Loss Carryforwards [Line Items]
Net operating loss carryforward, origination year	2014
Net operating loss carry forwards, amount	$ 2.4
Net operating loss carryforwards, expiration year	2034
Fiscal Year 2016
Operating Loss Carryforwards [Line Items]
Net operating loss carryforward, origination year	2016
Net operating loss carry forwards, amount	$ 0.5
Net operating loss carryforwards, expiration year	2036