XML 93 R77.htm IDEA: XBRL DOCUMENT
v3.21.2

Employee Benefit Plans - Additional Information (Detail) - USD ($) | 12 Months Ended
--- | ---
Jun. 26, 2021 | Jun. 27, 2020 | Jun. 29, 2019
Compensation And Retirement Disclosure [Abstract] |  |  |
Annual limit of employees contribution to defined contribution plan | $ 19,500 |  |
Annual limit of contribution for 50 years or older employees | $ 26,000 |  |
Percentage of maximum employer matching contribution to defined contribution plans | 25.00% |  |
Contributions by employer matching contributions | $ 1,800,000 | $ 2,100,000 | $ 2,400,000

X
- Definition Contributions by employer matching contributions. + References No definition available. + Details
Name: | syna_ContributionsByEmployerMatchingContributions
Namespace Prefix: | syna_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Defined contribution plans eligible employee contributions employees fifty and over annual limit. + References No definition available. + Details
Name: | syna_DefinedContributionPlansEligibleEmployeeContributionsEmployeesFiftyAndOverAnnualLimit
Namespace Prefix: | syna_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_CompensationAndRetirementDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage employer matches of the employee's percentage contribution matched. + References No definition available. + Details
Name: | us-gaap_DefinedContributionPlanEmployerMatchingContributionPercentOfMatch
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Maximum amount the employee may contribute to a defined contribution plan. + References No definition available. + Details
Name: | us-gaap_DefinedContributionPlanMaximumAnnualContributionsPerEmployeeAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration