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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 Dec. 28, 2012 | $ 31,742 | $ 364 | $ 162,251 | $ 1,580 | $ (132,453)
Balance (in shares) at Dec. 28, 2012 |  | 36,423 |  |  |
Net income (loss) | 398 | $ 0 | 0 | 0 | 398
Other comprehensive loss | (1,298) | 0 | 0 | (1,298) | 0
Common stock issued upon exercise of options | 3,286 | $ 7 | 3,279 | 0 | 0
Common stock issued upon exercise of options (in shares) |  | 645 |  |  |
Common stock issued upon cashless exercise of warrants | 0 | $ 5 | (5) | 0 | 0
Common stock issued upon cashless exercise of warrants (in shares) |  | 485 |  |  |
Stock-based compensation | 4,721 | $ 0 | 4,721 | 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 | 0 | $ 0 | 0 | 0 | 0
Vested restricted stock (in shares) |  | 17 |  |  |
Balance at Jan. 03, 2014 | 38,852 | $ 379 | 170,246 | 282 | (132,055)
Balance (in shares) at Jan. 03, 2014 |  | 37,911 |  |  |
Net income (loss) | (8,392) | $ 0 | 0 | 0 | (8,392)
Other comprehensive 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 income (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 | 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 |  |  |

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