Segment, Geographic Location and Customer Information - Additional Information (Detail)	3 Months Ended		9 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013 Segment	Dec. 31, 2012	Mar. 31, 2013
Revenues From External Customers And Long Lived Assets [Line Items]
Number of reportable segments			1
Percentage of net sales made to customers	10.00%	10.00%	10.00%	10.00%
Customers accounted for more than ten percent of accounts receivables	3		3		3
Customer 1
Revenues From External Customers And Long Lived Assets [Line Items]
Percentage of accounts receivable from major customers	23.00%		23.00%		17.00%
Customer 2
Revenues From External Customers And Long Lived Assets [Line Items]
Percentage of accounts receivable from major customers	19.00%		19.00%		14.00%
Customer 3
Revenues From External Customers And Long Lived Assets [Line Items]
Percentage of accounts receivable from major customers	18.00%		18.00%		11.00%