Annual report pursuant to Section 13 and 15(d)

Stockholders' Equity - Summary of Stock Options Activity (Details)

v3.21.1
Stockholders' Equity - Summary of Stock Options Activity (Details) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Jan. 02, 2021
Dec. 28, 2019
Dec. 29, 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 (4,500) (56,500)  
Options Outstanding, Granted 74,000 0  
Options Outstanding, Ending Balance 113,900 44,400 100,900
Options Outstanding, Exercisable 65,400    
Weighted Average Exercise Price      
Weighted Average Exercise Price, Beginning Balance $ 13.31 $ 11.07  
Weighted Average Exercise Price, Cancelled/expired 9.45 9.30  
Weighted Average Exercise Price, Granted 3.84    
Weighted Average Exercise Price, Ending Balance 11.97 $ 13.31 $ 11.07
Weighted Average Exercise Price, Exercisable $ 12.01    
Aggregate Intrinsic Value, Options Outstanding $ 78 $ 0 $ 0
Aggregate Intrinsic Value, Options Exercisable $ 27    
Weighted Average Remaining Contractual Life 7 years 3 years 3 years 9 months 18 days
Weighted Average Remaining Contractual Life, Exercisable 3 years