Stock Option and Purchase Plans (Details Textual) - USD ($)	12 Months Ended
Jun. 28, 2020	Jun. 30, 2019
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Options, granted	0	0
Employee Stock Purchase Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Maximum Contribution per participant per calendar year	$ 5,200
Maximum number of shares authorized for issuance from treasury under the Employee Stock Purchase Plan	100,000
Employee stock purchase plan average price of shares purchased during period	$ 19.42	$ 30.13
Shares available for issuance from treasury under the Employee Stock Purchase plan	53,871
Employee Stock Purchase Plan \| Treasury Stock
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares issued under stock purchase plan	4,246	3,295

This amount represents the maximum number of shares authorized for issuance under the plan.

No definition available.

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- Definition

For an employee stock purchase plan - the difference between the maximum number of shares authorized for issuance under the plan, and the number of shares already issued under the plan.

+ References

No definition available.

+ Details

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- Definition

Average share price of stock issued during the period as a result of an employee stock purchase plan.

+ References

No definition available.

+ Details

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- Definition

Maximum amount the employee may contribute to a defined contribution plan.

+ References

No definition available.

+ Details

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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- Definition

Gross number of share options (or share units) granted during the period.

+ References

No definition available.

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- Definition

Number of shares issued during the period as a result of an employee stock purchase plan.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21463-112644

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(28))
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Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
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-Subparagraph (SX 210.5-02(29))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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