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CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) shares in Thousands, $ in Thousands | Total | Common Stock | Additional Paid-In Capital | Accumulated Other Comprehensive Income (Loss) | Accumulated Deficit
--- | --- | --- | --- | --- | ---
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 | 2,413 |  |  |  | 2,413
Other comprehensive income (loss) | 161 |  |  | 161 |
Common stock issued upon exercise of options | 2,405 | $ 3 | 2,402 |  |
Common stock issued upon exercise of options (in shares) |  | 306 |  |  |
Stock-based compensation | $ 3,166 |  | 3,166 |  |
Unvested restricted stock (in shares) | (11) | 11 |  |  |
Vested restricted stock | $ 2 | $ 2 |  |  |
Vested restricted stock (in shares) |  | 177 |  |  |
Balance at Jun. 29, 2018 | 51,083 | $ 419 | 210,488 | (989) | (158,835)
Balance (in shares) at Jun. 29, 2018 |  | 41,877 |  |  |
Balance at Mar. 30, 2018 | 45,917 | $ 416 | 206,795 | (629) | (160,665)
Balance (in shares) at Mar. 30, 2018 |  | 41,592 |  |  |
Net income | 1,830 |  |  |  | 1,830
Other comprehensive income (loss) | (360) |  |  | (360) |
Common stock issued upon exercise of options | 1,952 | $ 2 | 1,950 |  |
Common stock issued upon exercise of options (in shares) |  | 249 |  |  |
Stock-based compensation | $ 1,743 |  | 1,743 |  |
Unvested restricted stock (in shares) | (11) | 11 |  |  |
Vested restricted stock | $ 1 | $ 1 |  |  |
Vested restricted stock (in shares) |  | 25 |  |  |
Balance at Jun. 29, 2018 | 51,083 | $ 419 | 210,488 | (989) | (158,835)
Balance (in shares) at Jun. 29, 2018 |  | 41,877 |  |  |
Balance at Dec. 28, 2018 | 132,426 | $ 442 | 289,584 | (1,320) | (156,280)
Balance (in shares) at Dec. 28, 2018 |  | 44,195 |  |  |
Net income | 5,281 |  |  |  | 5,281
Adoption of ASC/ ASU | Accounting Standards Update 2016-02 | 113 |  |  |  | 113
Adoption of ASC/ ASU | Accounting Standards Update 2018-07 |  |  | (315) |  | 315
Other comprehensive income (loss) | (282) |  |  | (282) |
Common stock issued upon exercise of options | $ 1,110 | $ 1 | 1,109 |  |
Common stock issued upon exercise of options (in shares) | 126 | 126 |  |  |
Stock-based compensation | $ 5,685 |  | 5,685 |  |
Unvested restricted stock (in shares) | (11) | 11 |  |  |
Vested restricted stock | $ 2 | $ 2 |  |  |
Vested restricted stock (in shares) |  | 202 |  |  |
Balance at Jun. 28, 2019 | 144,335 | $ 445 | 296,063 | (1,602) | (150,571)
Balance (in shares) at Jun. 28, 2019 |  | 44,534 |  |  |
Balance at Mar. 29, 2019 | 137,338 | $ 444 | 292,722 | (1,343) | (154,485)
Balance (in shares) at Mar. 29, 2019 |  | 44,447 |  |  |
Net income | 3,914 |  |  |  | 3,914
Other comprehensive income (loss) | (259) |  |  | (259) |
Common stock issued upon exercise of options | 487 | $ 1 | 486 |  |
Common stock issued upon exercise of options (in shares) |  | 52 |  |  |
Stock-based compensation | $ 2,855 |  | 2,855 |  |
Unvested restricted stock (in shares) | (10) | 11 |  |  |
Vested restricted stock (in shares) |  | 24 |  |  |
Balance at Jun. 28, 2019 | $ 144,335 | $ 445 | $ 296,063 | $ (1,602) | $ (150,571)
Balance (in shares) at Jun. 28, 2019 |  | 44,534 |  |  |

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