Annual report pursuant to Section 13 and 15(d)

Segment Information - Additional Information (Detail)

v3.20.1
Segment Information - Additional Information (Detail)
12 Months Ended
Mar. 31, 2020
Segment
Customer
Mar. 31, 2019
Customer
Mar. 31, 2018
Customer
Segment Reporting Information [Line Items]      
Number of reportable operating segments | Segment 1    
Customer Concentration Risk [Member] | Net Sales [Member]      
Segment Reporting Information [Line Items]      
Number of customers | Customer 1 1 0
Concentration risk percentage 13.00% 12.00%  
Customer Concentration Risk [Member] | Net Sales [Member] | Minimum [Member]      
Segment Reporting Information [Line Items]      
Concentration risk percentage     10.00%