Segment, Geographic Location, and Customer Information - Net Sales of 10% or More of Total Revenues Derived from Customers (Detail)	3 Months Ended				6 Months Ended
	Sep. 30, 2013		Sep. 30, 2012		Sep. 30, 2013		Sep. 30, 2012
Entity Wide Revenue Major Customer [Line Items]
Percentage of net sales made to customers	10.00%		10.00%		10.00%		10.00%
Customer Concentration Risk | Customer A
Entity Wide Revenue Major Customer [Line Items]
Percentage of net sales made to customers	21.00%		13.00%		28.00%		15.00%
Customer Concentration Risk | Customer B
Entity Wide Revenue Major Customer [Line Items]
Percentage of net sales made to customers	23.00%		15.00%		18.00%		15.00%
Customer Concentration Risk | Customer C
Entity Wide Revenue Major Customer [Line Items]
Percentage of net sales made to customers	18.00%		17.00%		18.00%		22.00%
Customer Concentration Risk | Customer D
Entity Wide Revenue Major Customer [Line Items]
Percentage of net sales made to customers	10.00%			[1]		[1]		[1]
Customer Concentration Risk | Customer E
Entity Wide Revenue Major Customer [Line Items]
Percentage of net sales made to customers		[1]	17.00%			[1]	11.00%

[1] Represents less than 10% of net sales.