Sales and Receivable Concentration - Sales to Largest Customers (Details) - USD ($) $ in Thousands	12 Months Ended
Jun. 27, 2021	Jun. 28, 2020
Sales to largest customers
Net sales	$ 485,295	$ 385,300
Fiat Chrysler Automobiles \| Customer Concentration Risk
Sales to largest customers
Net sales	$ 85,629	$ 85,010
Fiat Chrysler Automobiles \| Customer Concentration Risk \| Sales Revenue Net
Sales to largest customers
Percentage of Net Sales	18.00%	22.00%
General Motors Company \| Customer Concentration Risk
Sales to largest customers
Net sales	$ 146,547	$ 102,487
General Motors Company \| Customer Concentration Risk \| Sales Revenue Net
Sales to largest customers
Percentage of Net Sales	30.00%	27.00%
Ford Motor Company \| Customer Concentration Risk
Sales to largest customers
Net sales	$ 67,670	$ 52,666
Ford Motor Company \| Customer Concentration Risk \| Sales Revenue Net
Sales to largest customers
Percentage of Net Sales	14.00%	13.00%
Total of Major Customers \| Customer Concentration Risk
Sales to largest customers
Net sales	$ 299,846	$ 240,163
Total of Major Customers \| Customer Concentration Risk \| Sales Revenue Net
Sales to largest customers
Percentage of Net Sales	62.00%	62.00%

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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+ Details