Quarterly report pursuant to Section 13 or 15(d)

Shareholders' Equity - Schedule of All Outstanding Options Activity (Details)

v3.20.1
Shareholders' Equity - Schedule of All Outstanding Options Activity (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 12 Months Ended
Mar. 28, 2020
Dec. 28, 2019
Dec. 29, 2018
Dec. 30, 2018
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]        
Options Outstanding, Beginning Balance 44,400 100,900    
Options Outstanding, Cancelled/expired/forfeited   (56,500)    
Options Outstanding, Granted 34,000      
Options Outstanding, Ending Balance 78,400 44,400 100,900  
Weighted Average Exercise Price        
Weighted Average Exercise Price, Beginning Balance $ 13.31 $ 11.07    
Weighted Average Exercise Price, cancelled/expired/forfeited   9.30    
Weighted Average Exercise Price, Granted 3.85      
Weighted Average Exercise Price, Ending Balance $ 11.16 $ 13.31 $ 11.07  
Aggregate Intrinsic Value, Options Outstanding $ 0 $ 0   $ 0
Weighted Average Remaining Contractual Life 5 years 10 months 2 days 3 years 3 years 10 months 2 days