Organization and Summary of Significant Accounting Policies -Summary of Financial Assets and Liabilities at Fair Value on Recurring Basis (Details) - Fair Value Measurements Recurring - USD ($) $ in Thousands	Jun. 27, 2021	Jun. 28, 2020
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Total Assets at Fair Value	$ 3,826	$ 2,935
Fixed Income Funds
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Total Assets at Fair Value	960	793
Stock Index Funds | Small Cap
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Total Assets at Fair Value	384	251
Stock Index Funds | Mid Cap
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Total Assets at Fair Value	377	284
Stock Index Funds | Large Cap
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Total Assets at Fair Value	756	563
Stock Index Funds | International
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Total Assets at Fair Value	1,104	820
Cash and Cash Equivalents
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Total Assets at Fair Value	2	224
Mexican Peso Forward Contracts
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Total Assets at Fair Value	243
Total Liabilities at Fair Value		480
Level 1
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Total Assets at Fair Value	3,581	2,711
Level 1 | Fixed Income Funds
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Total Assets at Fair Value	960	793
Level 1 | Stock Index Funds | Small Cap
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Total Assets at Fair Value	384	251
Level 1 | Stock Index Funds | Mid Cap
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Total Assets at Fair Value	377	284
Level 1 | Stock Index Funds | Large Cap
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Total Assets at Fair Value	756	563
Level 1 | Stock Index Funds | International
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Total Assets at Fair Value	1,104	820
Level 2
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Total Assets at Fair Value	245	224
Level 2 | Cash and Cash Equivalents
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Total Assets at Fair Value	2	224
Level 2 | Mexican Peso Forward Contracts
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Total Assets at Fair Value	$ 243
Total Liabilities at Fair Value		$ 480