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Earnings (Loss) Per Share (Disclosure of basic and diluted earnings (loss) per share) (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 3 Months Ended 6 Months Ended
Jul. 03, 2021
Jun. 27, 2020
Jul. 03, 2021
Jun. 27, 2020
Numerator for basic earnings (loss) per share:        
Earnings (loss) from continuing operations $ (918) $ (5,133) $ 754 $ (9,097)
Less: dividends and accretion (744) (2,604) (2,697) (4,629)
Loss from continuing operations attributable to common shareholders (1,662) (7,737) (1,943) (13,726)
Earnings from discontinued operations 0 6,140 0 13,465
Loss attributable to common shareholders $ (1,662) $ (1,597) $ (1,943) $ (261)
Denominator for basic earnings (loss) per share:        
Basic weighted-average number of shares outstanding 105,676 89,089 100,898 88,625
From continuing operations $ (0.02) $ (0.09) $ (0.02) $ (0.15)
From discontinued operations 0 0.07 0 0.15
Basic earnings (loss) per share $ (0.02) $ (0.02) $ (0.02) $ (0.00)
Numerator for diluted earnings (loss) per share:        
Earnings (loss) from continuing operations $ (918) $ (5,133) $ 754 $ (9,097)
Loss from continuing operations attributable to common shareholders (1,662) (7,737) (1,943) (13,726)
Earnings from discontinued operations 0 6,140 0 13,465
Earnings (loss) attributable to common shareholders $ (1,662) $ (1,597) $ (1,943) $ (261)
Denominator for diluted earnings (loss) per share:        
Basic weighted-average number of shares outstanding 105,676 89,089 100,898 88,625
Dilutive effect of the following:        
Diluted weighted-average number of shares outstanding 105,676 89,089 100,898 88,625
From continuing operations $ (0.02) $ (0.09) $ (0.02) $ (0.15)
From discontinued operations 0 0.07 0 0.15
Diluted loss per share $ (0.02) $ (0.02) $ (0.02) $ (0.00)
Series A Preferred Stock [Member]        
Numerator for basic earnings (loss) per share:        
Less: dividends and accretion $ 0 $ (2,066) $ (1,212) $ (4,091)
Numerator for diluted earnings (loss) per share:        
Less: dividends and accretion on Preferred Stock $ 0 $ (2,066) $ (1,212) $ (4,091)
Dilutive effect of the following:        
Diluted weighted-average number of shares outstanding 0 0 0 0
Series B Preferred Stock [Member]        
Numerator for basic earnings (loss) per share:        
Less: dividends and accretion $ (744) $ (538) $ (1,485) $ (538)
Numerator for diluted earnings (loss) per share:        
Less: dividends and accretion on Preferred Stock $ (744) $ (538) $ (1,485) $ (538)
Dilutive effect of the following:        
Diluted weighted-average number of shares outstanding 0 0 0 0
Stock options and restricted stock units [Member]        
Dilutive effect of the following:        
Diluted weighted-average number of shares outstanding 0 0 0 0