| Component: (Network and Table) | |
|---|---|
| Network | 2420405 - Disclosure - Segment Information (Long-Lived Assets by Geographic Region) (Detail) (http://www.realnetworks.com/role/SegmentInformationLongLivedAssetsByGeographicRegionDetail) |
| Table | Schedule of Revenues from External Customers and Long-Lived Assets [Table] |
| Reporting Entity [Axis] | 0001046327 (http://www.sec.gov/CIK) |
| Revenues from External Customers and Long-Lived Assets [Line Items] | Period [Axis] | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
2016-12-31 | 2015-12-31 | 2014-12-31 | |||||||||||||
| Geographical [Axis] | Geographical [Axis] | Geographical [Axis] | |||||||||||||
| United States | Europe | Republic of Korea | Rest of the World | Geographical [Domain] | United States | Europe | Republic of Korea | Rest of the World | Geographical [Domain] | United States | Europe | Republic of Korea | Rest of the World | Geographical [Domain] | |
Long-lived assets | |||||||||||||||