Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting Policies (Details Textual)

v3.20.2
Summary of Significant Accounting Policies (Details Textual) - USD ($)
$ in Thousands
6 Months Ended
Jun. 27, 2020
Jun. 29, 2019
Dec. 28, 2019
Accounting Policies [Abstract]      
Contract asset, current $ 2,354   $ 2,796
Contract Liabilities, current 633   $ 353
Research and development costs charged to expense $ 7,989 $ 7,778