v2.4.0.8

Organization and Summary of Significant Accounting Policies - Accounts Receivable Balance Percentage of Different Customers (Detail) | Jun. 29, 2013 | Jun. 30, 2012
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Customer A [Member] |  |
Accounts Receivable By Major Customers [Line Items] |  |
Accounts Receivable Major Customer Percentage | 27.00% |
Customer B [Member] |  |
Accounts Receivable By Major Customers [Line Items] |  |
Accounts Receivable Major Customer Percentage |  | 14.00%
Customer C [Member] |  |
Accounts Receivable By Major Customers [Line Items] |  |
Accounts Receivable Major Customer Percentage |  | 12.00%

X
- Details
Name: | syna_AccountsReceivableByMajorCustomersLineItems
Namespace Prefix: | syna_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Accounts receivable balance percentage. + References No definition available. + Details
Name: | syna_EntityWideAccountsReceivableMajorCustomerPercentage
Namespace Prefix: | syna_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant