Segment, Geographic Location and Customer Information - Additional Information (Detail)	6 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
Revenues From External Customers And Long Lived Assets [Line Items]
Number of reportable segments	1
Customers accounted for more than ten percent of accounts receivables	3	3
Net Accounts Receivable | Customer 1
Revenues From External Customers And Long Lived Assets [Line Items]
Percentage of accounts receivable from major customers	22.00%	33.00%
Net Accounts Receivable | Customer 2
Revenues From External Customers And Long Lived Assets [Line Items]
Percentage of accounts receivable from major customers	20.00%	21.00%
Net Accounts Receivable | Customer 3
Revenues From External Customers And Long Lived Assets [Line Items]
Percentage of accounts receivable from major customers	16.00%	10.00%