Annual report pursuant to Section 13 and 15(d)

Stockholders' Equity - Additional Information (Details)

v3.21.1
Stockholders' Equity - Additional Information (Details) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Jan. 02, 2021
Dec. 28, 2019
Nov. 05, 2020
Nov. 04, 2020
Nov. 03, 2020
Dec. 29, 2018
Shareholders Equity [Line Items]            
Common stock, shares authorized (in shares) 200,000,000 200,000,000 200,000,000      
Share based compensation, value $ 578 $ 631        
Common stock, issued shares (in shares) 1,829,982 1,919,048        
Common stock, outstanding shares (in shares) 1,829,982 1,919,048        
Options outstanding 113,900 44,400       100,900
Warrants outstanding 33,363 33,363        
Warrant exercise price $ 3.40 $ 3.40        
Warrant expiration date Nov. 30, 2021 Nov. 30, 2021        
Stock Options            
Shareholders Equity [Line Items]            
Share-based compensation expense $ 173          
Unrecognized compensation expense, net of estimated forfeitures $ 55          
Unrecognized compensation expense, net of estimated forfeitures, period for recognition 2021-12          
2016 Plan            
Shareholders Equity [Line Items]            
Options expiration date Oct. 28, 2026          
Increased number of shares of common stock reserved for issuance       800,000 400,000  
Options outstanding 78,000 4,000        
2011 Plan            
Shareholders Equity [Line Items]            
Options expiration date May 12, 2021          
Options outstanding 35,900 40,400        
Additional awards to be granted after adoption of 2016 plan 0          
Common Stock            
Shareholders Equity [Line Items]            
Share-based compensation, shares 33,191 224,483        
Share-based compensation expense $ 54 $ 131        
Contractor            
Shareholders Equity [Line Items]            
Stock issued for services, shares 104,798          
Stock issued for services, value $ 351          
Employees and Consultants            
Shareholders Equity [Line Items]            
Share-based compensation, shares   224,483        
Share based compensation, value   $ 500        
Articles of Incorporation            
Shareholders Equity [Line Items]            
Common stock, shares authorized (in shares)     200,000,000 10,000,000