Segment, Geographic Location and Customer Information - Net Sales of 10% or More of Total Revenues Derived from Customers (Detail) - Net Sales - Customer Concentration Risk	3 Months Ended		6 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Customer A
Entity Wide Revenue Major Customer [Line Items]
Percentage of net sales made to customers	31.00%	17.00%	29.00%	12.00%
Customer B
Entity Wide Revenue Major Customer [Line Items]
Percentage of net sales made to customers	13.00%	12.00%	15.00%	20.00%
Customer C
Entity Wide Revenue Major Customer [Line Items]
Percentage of net sales made to customers	14.00%	17.00%	14.00%	18.00%
Customer D
Entity Wide Revenue Major Customer [Line Items]
Percentage of net sales made to customers		14.00%		11.00%