Annual and transition report of foreign private issuers pursuant to Section 13 or 15(d)

Operating Segment Information and Concentrations of Risk - Additional Information (Detail)

v3.7.0.1
Operating Segment Information and Concentrations of Risk - Additional Information (Detail) - Customer
12 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Mar. 31, 2015
Segment Reporting Information [Line Items]      
Percentage of gross sales individually account for one customer 10.00% 10.00% 10.00%
Number of customer 1    
Accounts Receivable [Member] | Customer Concentration Risk [Member]      
Segment Reporting Information [Line Items]      
Concentration risk, percentage 9.10% 8.10%  
Net Sales [Member] | Geographic Concentration Risk [Member]      
Segment Reporting Information [Line Items]      
Concentration risk, percentage 21.00% 22.00% 25.00%