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Earnings (Loss) Per Share (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended
Apr. 02, 2019
Apr. 03, 2018
Jan. 01, 2019
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]      
Document Period End Date Apr. 02, 2019    
Net Income (Loss) Available to Common Stockholders, Basic $ (1,851) $ (3,575)  
Net loss $ (1,851) $ (3,575)  
Shares:      
Basic weighted average shares outstanding (in shares) 43,933,235 41,128,473  
Effect of dilutive securities (in shares) 0 0  
Diluted weighted average number of shares outstanding (in shares) 43,933,235 41,128,473  
Earnings (loss) per share:      
Basic loss per share (USD per share) $ (0.04) $ (0.09)  
Diluted loss per share (USD per share) $ (0.04) $ (0.09)  
Preferred stock, shares issued (in shares) 0   0
Antidilutive securities excluded from computation of earnings per share 3,245,418 3,106,710