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)

v3.8.0.1
Operating Segment Information and Concentrations of Risk - Additional Information (Detail)
12 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Mar. 31, 2016
Accounts Receivable [Member] | Customer A [Member] | Customer Concentration Risk [Member]      
Segment Reporting Information [Line Items]      
Concentration risk, percentage 9.00% 9.10%  
Net Sales [Member] | Geographic Concentration Risk [Member]      
Segment Reporting Information [Line Items]      
Concentration risk, percentage 22.00% 21.00% 22.00%