Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity (Details)

v3.23.2
Stockholders' Equity (Details)
$ / shares in Units, $ in Thousands
 3 Months Ended 6 Months Ended
Jun. 01, 2023
shares
Mar. 22, 2023
USD ($)
$ / shares
shares
Mar. 17, 2023
shares
Jul. 01, 2023
USD ($)
$ / shares
shares
Jul. 02, 2022
USD ($)
shares
Jul. 01, 2023
USD ($)
$ / shares
shares
Jul. 02, 2022
USD ($)
Dec. 31, 2022
$ / shares
shares
Jan. 01, 2022
shares
Shareholders Equity [Line Items]                  
Common stock, shares authorized (in shares)       10,000,000   10,000,000   10,000,000  
Stock issued for services, (in shares)       0 0        
Common Stock, par value (in usd per share) | $ / shares       $ 0.001   $ 0.001   $ 0.001  
Common stock, issued shares (in shares)       3,768,878   3,768,878   2,827,410  
Common stock, outstanding shares (in shares)       3,768,878   3,768,878   2,827,410  
Options outstanding (in share)       114,000   114,000   110,000 117,500
Options granted (in share)           10,000      
Preferred stock, outstanding shares (in shares)       209,706   209,706   222,588  
Stock Options                  
Shareholders Equity [Line Items]                  
Share-based compensation expense | $       $ 4,000 $ 1,000 $ 12,000 $ 1,000    
Unrecognized compensation expense, net of estimated forfeitures | $       $ 1,100   $ 1,100      
2016 Plan                  
Shareholders Equity [Line Items]                  
Options authorized for issuance (in share)       800,000   800,000      
Options outstanding (in share)       100,000   100,000   90,000  
2011 Plan                  
Shareholders Equity [Line Items]                  
Options outstanding (in share)       14,000   14,000   20,000  
Additional awards to be granted after adoption of 2016 plan (in share)           0      
Series A-1 Preferred                  
Shareholders Equity [Line Items]                  
Preferred stock, conversion ratio       0.05   0.05      
Conversion of stock, shares issued (in shares) 7,697   5,185     12,882      
Preferred stock, outstanding shares (in shares)       209,706   209,706   222,588  
Articles of Incorporation                  
Shareholders Equity [Line Items]                  
Common stock, shares authorized (in shares)       200,000,000   200,000,000      
Securities Purchase Agreement                  
Shareholders Equity [Line Items]                  
Common stock offering shares (in shares)   361,000              
Common Stock, par value (in usd per share) | $ / shares   $ 0.001              
Common stock purchase price per share (in usd per share) | $ / shares   $ 1.17              
Proceeds from sale of common stock | $   $ 422