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CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($)
shares in Thousands, $ in Thousands
Total
Common Stock
Additional Paid-in Capital
Accumulated Other Comprehensive Income (Loss)
Retained Earnings
Balance at Jan. 01, 2016 $ 38,846 $ 399 $ 187,007 $ (1,580) $ (146,980)
Balance (in shares) at Jan. 01, 2016   39,887      
Net income (loss) (12,129) $ 0 0 0 (12,129)
Other comprehensive income (loss) 530 0 0 530 0
Common stock issued upon exercise of options 2,438 $ 5 2,433 0 0
Common stock issued upon exercise of options (in shares)   541      
Stock-based compensation 8,827 $ 0 8,827 0 0
Stock-based compensation (in shares)   0      
Repurchase of employee common stock for taxes withheld (611) $ 0 (611) 0 0
Repurchase of employee common stock for taxes withheld (in shares)   (98)      
Unvested restricted stock $ 0 $ 0 0 0 0
Unvested restricted stock (in shares) (23) 23      
Vested restricted stock $ 4 $ 3 1 0 0
Vested restricted stock (in shares)   379      
Balance at Dec. 30, 2016 37,905 $ 407 197,657 (1,050) (159,109)
Balance (in shares) at Dec. 30, 2016   40,732      
Net income (loss) (2,139) $ 0 0 0 (2,139)
Other comprehensive income (loss) (100) 0 0 (100) 0
Common stock issued upon exercise of options 3,970 $ 6 3,964 0 0
Common stock issued upon exercise of options (in shares)   557      
Stock-based compensation 3,533 $ 0 3,533 0 0
Stock-based compensation (in shares)   0      
Repurchase of employee common stock for taxes withheld (234) $ 0 (234) 0 0
Repurchase of employee common stock for taxes withheld (in shares)   (24)      
Unvested restricted stock $ 0 $ 0 0 0 0
Unvested restricted stock (in shares) (21) 21      
Vested restricted stock $ 1 $ 1 0 0 0
Vested restricted stock (in shares)   97      
Balance at Dec. 29, 2017 42,936 $ 414 204,920 (1,150) (161,248)
Balance (in shares) at Dec. 29, 2017   41,383      
Net income (loss) 4,968 $ 0 0 0 4,968
Other comprehensive income (loss) (170) 0 0 (170) 0
Proceeds from public offering of stock 72,150 $ 20 72,130 0 0
Proceeds from public offering of stock (in shares)   2,000      
Common stock issued upon exercise of options $ 5,195 $ 6 5,189 0 0
Common stock issued upon exercise of options (in shares) 596 595      
Stock-based compensation $ 7,399 $ 0 7,399 0 0
Stock-based compensation (in shares)   0      
Repurchase of employee common stock for taxes withheld (54) $ 0 (54) 0 0
Repurchase of employee common stock for taxes withheld (in shares)   0      
Unvested restricted stock $ 0 $ 0 0 0 0
Unvested restricted stock (in shares) (11) 11      
Vested restricted stock $ 2 $ 2 0 0 0
Vested restricted stock (in shares)   206      
Balance at Dec. 28, 2018 $ 132,426 $ 442 $ 289,584 $ (1,320) $ (156,280)
Balance (in shares) at Dec. 28, 2018   44,195