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Significant Customer and Other Information (Details)
 3 Months Ended 12 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Mar. 31, 2018
Sales [Member]      
Concentration Risk [Abstract]      
Concentration risk percentage 100.00% 100.00%  
Sales [Member] | Customer A [Member]      
Concentration Risk [Abstract]      
Concentration risk percentage 37.00% 40.00%  
Sales [Member] | Customer B [Member]      
Concentration Risk [Abstract]      
Concentration risk percentage 22.00% 25.00%  
Sales [Member] | Customer C [Member]      
Concentration Risk [Abstract]      
Concentration risk percentage 26.00% 16.00%  
Sales [Member] | Customer D [Member]      
Concentration Risk [Abstract]      
Concentration risk percentage 3.00% 8.00%  
Sales [Member] | Rotating Electrical Products [Member]      
Concentration Risk [Abstract]      
Concentration risk percentage 77.00% 78.00%  
Sales [Member] | Wheel Hub Products [Member]      
Concentration Risk [Abstract]      
Concentration risk percentage 18.00% 18.00%  
Sales [Member] | Brake Master Cylinders Products [Member]      
Concentration Risk [Abstract]      
Concentration risk percentage 3.00% 3.00%  
Sales [Member] | Other Products [Member]      
Concentration Risk [Abstract]      
Concentration risk percentage 2.00% 1.00%  
Accounts Receivable - Trade [Member] | Customer A [Member]      
Concentration Risk [Abstract]      
Concentration risk percentage 33.00%   36.00%
Accounts Receivable - Trade [Member] | Customer B [Member]      
Concentration Risk [Abstract]      
Concentration risk percentage 21.00%   16.00%
Accounts Receivable - Trade [Member] | Customer C [Member]      
Concentration Risk [Abstract]      
Concentration risk percentage 13.00%   22.00%
Accounts Receivable - Trade [Member] | Customer D [Member]      
Concentration Risk [Abstract]      
Concentration risk percentage 7.00%   5.00%