Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting Policies (Details Textual)

v3.21.1
Summary of Significant Accounting Policies (Details Textual) - USD ($)
$ in Thousands
3 Months Ended
Apr. 03, 2021
Mar. 28, 2020
Jan. 02, 2021
Accounting Policies [Abstract]      
Contract asset, current $ 2,239   $ 2,776
Contract Liabilities, current 3,865   $ 4,208
Research and development costs charged to expense $ 4,298 $ 4,107