| Operating Leases (Details 1) $ in Thousands | 12 Months Ended | 
|---|---|
| Dec. 28, 2019  USD ($) | |
| Cash paid for amounts included in the measurement of lease liabilities: | |
| Operating cash flows from operating leases | $ 3,714 | 
| ROU assets obtained in exchange for new operating lease liabilities | $ 1,834 | 
| X | ||||||||||
| 
- Definition Cash paid for amounts included in measurement of lease liabilities. No definition available. 
 | 
| X | ||||||||||
| 
- Definition Amount of cash outflow from operating lease, excluding payments to bring another asset to condition and location necessary for its intended use. Reference 1: http://www.xbrl.org/2003/role/disclosureRef 
 | 
| X | ||||||||||
| 
- Definition Amount of increase in right-of-use asset obtained in exchange for operating lease liability. Reference 1: http://www.xbrl.org/2003/role/exampleRef 
 |