| Component: (Network and Table) | |
|---|---|
| Network | 2416406 - Disclosure - Operating Segment and Geographic Information - Long-Lived Assets by Geographical Location (Details) (http://www.formfactor.com/role/OperatingSegmentAndGeographicInformationLongLivedAssetsByGeographicalLocationDetails) |
| Table | Schedule of Long-Lived Assets by Geographical Location [Table] |
| Reporting Entity [Axis] | 0001039399 (http://www.sec.gov/CIK) |
| Long-Lived Assets [Line Items] | Period [Axis] | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
2016-12-31 | 2015-12-26 | |||||||||||||
| Geographical [Axis] | Geographical [Axis] | |||||||||||||
| United States | Europe | Asia-Pacific | South Korea | Japan | Singapore | Segment, Geographical [Domain] | United States | Europe | Asia-Pacific | South Korea | Japan | Singapore | Segment, Geographical [Domain] | |
Long-lived assets | ||||||||||||||