Significant Customer and Other Information (Details)	3 Months Ended		12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Mar. 31, 2021
Net Sales [Member] | Customer Concentration Risk [Member] | Customer A [Member]
Concentration Risk [Abstract]
Concentration risk percentage	34.00%	45.00%
Net Sales [Member] | Customer Concentration Risk [Member] | Customer B [Member]
Concentration Risk [Abstract]
Concentration risk percentage	20.00%	26.00%
Net Sales [Member] | Customer Concentration Risk [Member] | Customer C [Member]
Concentration Risk [Abstract]
Concentration risk percentage	31.00%	17.00%
Net Sales [Member] | Product Concentration Risk [Member]
Concentration Risk [Abstract]
Concentration risk percentage	100.00%	100.00%
Net Sales [Member] | Product Concentration Risk [Member] | Rotating Electrical Products [Member]
Concentration Risk [Abstract]
Concentration risk percentage	67.00%	72.00%
Net Sales [Member] | Product Concentration Risk [Member] | Wheel Hub Products [Member]
Concentration Risk [Abstract]
Concentration risk percentage	14.00%	18.00%
Net Sales [Member] | Product Concentration Risk [Member] | Brake-Related Products [Member]
Concentration Risk [Abstract]
Concentration risk percentage	16.00%	9.00%
Net Sales [Member] | Product Concentration Risk [Member] | Other Products [Member]
Concentration Risk [Abstract]
Concentration risk percentage	3.00%	1.00%
Accounts Receivable - Trade [Member] | Customer Concentration Risk [Member] | Customer A [Member]
Concentration Risk [Abstract]
Concentration risk percentage	43.00%		50.00%
Accounts Receivable - Trade [Member] | Customer Concentration Risk [Member] | Customer B [Member]
Concentration Risk [Abstract]
Concentration risk percentage	24.00%		23.00%
Accounts Receivable - Trade [Member] | Customer Concentration Risk [Member] | Customer C [Member]
Concentration Risk [Abstract]
Concentration risk percentage	1.00%		0.00%