| Component: (Network and Table) | |
|---|---|
| Network | 063 - Disclosure - Note 14 - Segment Information - Revenues by Geographic Area (Details) (http://www.rcmt.com/20161231/role/statement-note-14-segment-information-revenues-by-geographic-area-details) |
| Table | Statement [Table] |
| Reporting Entity [Axis] | 0000700841 (http://www.sec.gov/CIK) |
| Scenario [Axis] | Scenario, Unspecified [Domain] |
| Statement [Line Items] | Period [Axis] | |||||||
|---|---|---|---|---|---|---|---|---|
2016-01-03 - 2016-12-31 | 2015-01-04 - 2016-01-02 | |||||||
| Geographical [Axis] | Geographical [Axis] | |||||||
| UNITED STATES | CANADA | PUERTO RICO | Geographical [Domain] | UNITED STATES | CANADA | PUERTO RICO | Geographical [Domain] | |
Revenue | 176,448,000 | 185,736,000 | ||||||