Significant Customer and Other Information (Details)	3 Months Ended		9 Months Ended		12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Mar. 31, 2019
Net Sales [Member]
Concentration Risk [Abstract]
Concentration risk percentage	100.00%	100.00%	100.00%	100.00%
Net Sales [Member] | Customer A [Member]
Concentration Risk [Abstract]
Concentration risk percentage	38.00%	33.00%	39.00%	36.00%
Net Sales [Member] | Customer B [Member]
Concentration Risk [Abstract]
Concentration risk percentage	22.00%	20.00%	21.00%	23.00%
Net Sales [Member] | Customer C [Member]
Concentration Risk [Abstract]
Concentration risk percentage	25.00%	26.00%	23.00%	23.00%
Net Sales [Member] | Rotating Electrical Products [Member]
Concentration Risk [Abstract]
Concentration risk percentage	75.00%	81.00%	76.00%	79.00%
Net Sales [Member] | Wheel Hub Products [Member]
Concentration Risk [Abstract]
Concentration risk percentage	14.00%	14.00%	15.00%	15.00%
Net Sales [Member] | Brake Caliper Products [Member]
Concentration Risk [Abstract]
Concentration risk percentage	5.00%	0.00%	3.00%	0.00%
Net Sales [Member] | Brake Master Cylinders Products [Member]
Concentration Risk [Abstract]
Concentration risk percentage	2.00%	1.00%	2.00%	2.00%
Net Sales [Member] | Other Products [Member]
Concentration Risk [Abstract]
Concentration risk percentage	4.00%	4.00%	4.00%	4.00%
Accounts Receivable - Trade [Member] | Customer A [Member]
Concentration Risk [Abstract]
Concentration risk percentage			31.00%		34.00%
Accounts Receivable - Trade [Member] | Customer B [Member]
Concentration Risk [Abstract]
Concentration risk percentage			16.00%		18.00%
Accounts Receivable - Trade [Member] | Customer C [Member]
Concentration Risk [Abstract]
Concentration risk percentage			16.00%		16.00%