XML 58 R46.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Indemnifications, Contingencies and Legal Proceedings - Additional Information (Detail) - USD ($) $ in Millions | 1 Months Ended |  |
--- | --- | --- | ---
Oct. 31, 2018 | Dec. 31, 2018 | Jun. 30, 2018
Commitments And Contingencies Disclosure [Abstract] |  |  |
Contingent consideration liabilities recorded for business combinations |  | $ 1.9 | $ 8.7
Payment for contingent consideration liabilities recorded for business combinations | $ 6.8 |  |

X
- Definition Business combination contingent consideration liability paid. + References No definition available. + Details
Name: | syna_BusinessCombinationContingentConsiderationLiabilityPaid
Namespace Prefix: | syna_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of liability recognized arising from contingent consideration in a business combination, expected to be settled within one year or the normal operating cycle, if longer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 25 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6911189&loc=d3e6408-128476 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 35 -Paragraph 1 -Subparagraph b -URI http://asc.fasb.org/extlink&oid=6911338&loc=d3e6819-128478 + Details
Name: | us-gaap_BusinessCombinationContingentConsiderationLiabilityCurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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