Significant Customers - Schedule of Percentage of Net Sales and Net Accounts Receivables Due from Customers (Detail)	12 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
Concentration Risk [Line Items]
Concentration risk percentage	10.00%
Sales Revenue, Net [Member]
Concentration Risk [Line Items]
Concentration risk percentage	100.00%	100.00%
Accounts Receivable [Member]
Concentration Risk [Line Items]
Concentration risk percentage	100.00%	100.00%
BMW [Member] | Sales Revenue, Net [Member]
Concentration Risk [Line Items]
Concentration risk percentage	16.00%	18.00%
BMW [Member] | Accounts Receivable [Member]
Concentration Risk [Line Items]
Concentration risk percentage	11.00%	12.00%
Fiat Chrysler Automobiles [Member] | Sales Revenue, Net [Member]
Concentration Risk [Line Items]
Concentration risk percentage	13.00%	9.00%
Fiat Chrysler Automobiles [Member] | Accounts Receivable [Member]
Concentration Risk [Line Items]
Concentration risk percentage	13.00%	12.00%
Audi/Volkswagen [Member] | Sales Revenue, Net [Member]
Concentration Risk [Line Items]
Concentration risk percentage	12.00%	13.00%
Audi/Volkswagen [Member] | Accounts Receivable [Member]
Concentration Risk [Line Items]
Concentration risk percentage	7.00%	9.00%
Toyota/Lexus [Member] | Sales Revenue, Net [Member]
Concentration Risk [Line Items]
Concentration risk percentage	8.00%	10.00%
Toyota/Lexus [Member] | Accounts Receivable [Member]
Concentration Risk [Line Items]
Concentration risk percentage	4.00%	6.00%
Other Customers [Member] | Sales Revenue, Net [Member]
Concentration Risk [Line Items]
Concentration risk percentage	51.00%	50.00%
Other Customers [Member] | Accounts Receivable [Member]
Concentration Risk [Line Items]
Concentration risk percentage	65.00%	61.00%