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Condensed Consolidated Statements of Equity (Unaudited) - USD ($)
Total
Cumulative Effect, Period of Adoption, Adjustment [Member]
Revision of Prior Period, Adjustment [Member]
Common Stock [Member]
Treasury Stock [Member]
Warrants [Member]
Additional Paid-in-Capital [Member]
Accumulated Deficit [Member]
Accumulated Deficit [Member]
Cumulative Effect, Period of Adoption, Adjustment [Member]
Revision of Prior Period, Adjustment [Member]
Non-Controlling Interest [Member]
Beginning balance at Dec. 29, 2019 $ 69,169,000   $ 331,000 $ (112,680,000)   $ 435,278,000 $ (254,081,000)   $ 321,000
Beginning balance, common shares at Dec. 29, 2019     23,638,000            
Cumulative impact (ASU 2016-13 (Topic 326) [Member]) at Dec. 29, 2019   $ (5,000)           $ (5,000)  
Net loss (13,350,000)           (13,336,000)   (14,000)
Shares issued under equity compensation plan, shares     68,000            
Treasury shares used for stock-based plans (71,000)     (71,000)          
Treasury shares used for stock-based plans, shares     (22,000)            
Distributions to non-controlling interest (172,000)               (172,000)
Contributions from non-controlling interest 143,000               143,000
Stock-based compensation expense 490,000         490,000      
Ending balance at Mar. 29, 2020 56,204,000   $ 331,000 (112,751,000)   435,768,000 (267,422,000)   278,000
Ending balance, common shares at Mar. 29, 2020     23,684,000            
Beginning balance at Dec. 27, 2020 $ 5,495,000   $ 339,000 (113,266,000)   438,174,000 (319,477,000)   (275,000)
Beginning balance, common shares at Dec. 27, 2020 24,323,000   24,323,000            
Cumulative impact at Dec. 27, 2020 $ (319,477,000)                
Net loss (14,474,000)           (14,472,000)   (2,000)
Shares issued under equity compensation plans     $ 1,000     (1,000)      
Shares issued under equity compensation plan, shares     63,000            
Issuance of common shares and warrants, net of fees 14,940,000   $ 32,000   $ 2,566,000 12,342,000      
Issuance of common shares and warrants, net of fees, shares     3,250,000            
Contributions from non-controlling interest 136,000               136,000
Stock-based compensation expense 193,000         193,000      
Ending balance at Mar. 28, 2021 $ 6,290,000   $ 372,000 $ (113,266,000) $ 2,566,000 $ 450,708,000 $ (333,949,000)   $ (141,000)
Ending balance, common shares at Mar. 28, 2021 27,636,000   27,636,000