Sales and Receivable Concentration - Receivables from Largest Customers (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 28, 2020	Jun. 30, 2019
Receivables from largest customers
Receivables	$ 41,955	$ 84,230
Customer Concentration Risk
Receivables from largest customers
Receivables	$ 24,612	$ 41,896
Customer Concentration Risk | Accounts Receivable
Receivables from largest customers
Percentage of Gross Receivables	59.00%	50.00%
Fiat Chrysler Automobiles | Customer Concentration Risk
Receivables from largest customers
Receivables	$ 5,881	$ 19,151
Fiat Chrysler Automobiles | Customer Concentration Risk | Accounts Receivable
Receivables from largest customers
Percentage of Gross Receivables	14.00%	23.00%
General Motors Company | Customer Concentration Risk
Receivables from largest customers
Receivables	$ 12,630	$ 12,754
General Motors Company | Customer Concentration Risk | Accounts Receivable
Receivables from largest customers
Percentage of Gross Receivables	30.00%	15.00%
Ford Motor Company | Customer Concentration Risk
Receivables from largest customers
Receivables	$ 6,101	$ 9,991
Ford Motor Company | Customer Concentration Risk | Accounts Receivable
Receivables from largest customers
Percentage of Gross Receivables	15.00%	12.00%