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Significant Customer and Other Information (Tables)
 6 Months Ended
Sep. 30, 2020
Significant Customer and Other Information [Abstract]  
Concentrations of Risk
Significant Customer Concentrations

The largest customers accounted for the following  percentage of net sales:

 
  
Three Months Ended
September 30,
    
Six Months Ended
September 30
  
 
  
2020
    
2019
    
2020
    
2019
  
Net sales
                        
Customer A
    
45
%
    
41
%
    
45
%
    
40
%
Customer B
    
21
%
    
20
%
    
23
%
    
21
%
Customer C
    
23
%
    
23
%
    
20
%
    
22
%

The largest customers accounted for the following percentage of accounts receivable – trade:

 
  
September 30, 2020
    
March 31,2020
  
Accounts receivable - trade
            
Customer A
    
42
%
    
28
%
Customer B
    
20
%
    
14
%
Customer C
    
18
%
    
33
%

Geographic and Product Information

The Company’s products are sold predominantly in the U.S. and accounted for the following percentages of net sales:

 
  
Three Months Ended
September 30,
    
Six Months Ended
September 30
  
 
  
2020
    
2019
    
2020
    
2019
  
Rotating electrical products
    
80
%
    
77
%
    
77
%
    
76
%
Wheel hub products
    
12
%
    
15
%
    
14
%
    
16
%
Brake related products
    
7
%
    
6
%
    
8
%
    
6
%
Other products
    
1
%
    
2
%
    
1
%
    
2
%
 
    
100
%
    
100
%
    
100
%
    
100
%