Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting Policies (Details Textual)

v3.20.1
Summary of Significant Accounting Policies (Details Textual) - USD ($)
$ in Thousands
3 Months Ended
Mar. 28, 2020
Mar. 30, 2019
Dec. 28, 2019
Accounting Policies [Abstract]      
Contract asset, current $ 2,741   $ 2,796
Contract Liabilities, current 253   $ 353
Research and development costs charged to expense $ 4,107 $ 3,900