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CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($)
$ in Thousands
Total
Common Stock [Member]
Additional Paid-in Capital [Member]
Accumulated Other Comprehensive Income (Loss) [Member]
Retained Earnings [Member]
Balance at Jan. 03, 2014 $ 38,852 $ 379 $ 170,246 $ 282 $ (132,055)
Balance (in shares) at Jan. 03, 2014   37,911      
Net loss (8,392) $ 0 0 0 (8,392)
Other comprehensive income (loss) (1,352) 0 0 (1,352) 0
Common stock issued upon exercise of options 3,022 $ 5 3,017 0 0
Common stock issued upon exercise of options (in shares)   584      
Stock-based compensation 4,969 $ 0 4,969 0 0
Stock-based compensation (in shares)   0      
Unvested restricted stock (3) $ (3) 0 0 0
Unvested restricted stock (in shares)   (341)      
Vested restricted stock 3 $ 3 0 0 0
Vested restricted stock (in shares)   275      
Balance at Jan. 02, 2015 37,099 $ 384 178,232 (1,070) (140,447)
Balance (in shares) at Jan. 02, 2015   38,429      
Net loss (6,533) $ 0 0 0 (6,533)
Other comprehensive income (loss) (510) 0 0 (510) 0
Common stock issued upon exercise of warrants 2,800 $ 7 2,793 0 0
Common stock issued upon exercise of warrants (in shares)   700      
Common stock issued upon exercise of options 2,168 $ 5 2,163 0 0
Common stock issued upon exercise of options (in shares)   476      
Stock-based compensation 3,820 $ 0 3,820 0 0
Stock-based compensation (in shares)   0      
Unvested restricted stock 0 $ 1 (1) 0 0
Unvested restricted stock (in shares)   124      
Vested restricted stock 2 $ 2 0 0 0
Vested restricted stock (in shares)   158      
Balance at Jan. 01, 2016 38,846 $ 399 187,007 (1,580) (146,980)
Balance (in shares) at Jan. 01, 2016   39,887      
Net 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) 541,000 541      
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      
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