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Consolidated Statements of Shareholders' Equity - USD ($)
$ in Thousands
Total
Common Stock [Member]
Capital Surplus [Member]
Retained Earnings [Member]
Beginning Balance at Dec. 31, 2019 $ 290,287   $ 67,062 $ 223,225
Beginning Balance (in shares) at Dec. 31, 2019   19,149,000    
Issuance of common stock and warrant, net 67,342 $ 63,948 3,394  
Issuance of common stock and warrant, net (in shares)   3,500,000    
Exercise of stock options $ 27 $ 36 (9)  
Exercise of stock options (in shares) 1,000 1,000    
Issuance of restricted stock units $ (817) $ 7,728 (8,545)  
Issuance of restricted stock units (in shares)   163,000    
Repurchase, retirement and reclassification of common stock (15,014) $ (71,712)   56,698
Repurchase, retirement and reclassification of common stock (in shares)   (495,000)    
Stock-based compensation 9,820   9,820  
Adjustment to dividends previously accrued 28     28
Net income (loss) (57,885)     (57,885)
Ending Balance at Dec. 29, 2020 293,788   71,722 222,066
Ending Balance (in shares) at Dec. 29, 2020   22,318,000    
Issuance of common stock and warrant, net 28,907 $ 28,907    
Issuance of common stock and warrant, net (in shares)   703,000    
Exercise of stock options $ 4,511 $ 6,394 (1,883)  
Exercise of stock options (in shares) 129,000 122,000    
Issuance of restricted stock units $ (491) $ 7,476 (7,967)  
Issuance of restricted stock units (in shares)   161,000    
Repurchase, retirement and reclassification of common stock   $ (42,777)   42,777
Stock-based compensation 10,641   10,641  
Adjustment to dividends previously accrued 21     21
Net income (loss) (3,606)     (3,606)
Ending Balance at Dec. 28, 2021 333,771   72,513 261,258
Ending Balance (in shares) at Dec. 28, 2021   23,304,000    
Issuance of restricted stock units (381) $ 8,097 (8,478)  
Issuance of restricted stock units (in shares)   179,000    
Repurchase, retirement and reclassification of common stock $ (2,385) $ (8,097)   5,712
Repurchase, retirement and reclassification of common stock (in shares) (91,000) (91,000)    
Stock-based compensation $ 10,424   10,424  
Adjustment to dividends previously accrued 10     10
Net income (loss) 4,076     4,076
Ending Balance at Jan. 03, 2023 $ 345,515   $ 74,459 $ 271,056
Ending Balance (in shares) at Jan. 03, 2023   23,392,000