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CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) shares in Thousands, $ in Thousands | Total | Common Stock [Member] | Additional Paid-in Capital [Member] | Accumulated Other Comprehensive Income (Loss) [Member] | Retained Earnings [Member]
--- | --- | --- | --- | --- | ---
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 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 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 |  |  |
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 loss | (2,139) | $ 0 | 0 | 0 | (2,139)
Other comprehensive 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 | 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 |  |  |
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 |  |  |

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