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CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) shares in Thousands, $ in Thousands | Common Stock | Additional Paid-in-Capital | Accumulated Other Comprehensive Income | Accumulated Deficit | Treasury Stock | Total
--- | --- | --- | --- | --- | --- | ---
Balance at Dec. 31, 2016 | $ 34 | $ 308,815 | $ 648 | $ (192,091) | $ (132) | $ 117,274
Balance (in shares) at Dec. 31, 2016 | 33,971 |  |  |  | (28) |
Stockholders' Deficit |  |  |  |  |  |
Common stock issued under stock plans | $ 1 | 4,666 |  |  |  | 4,667
Common stock issued under stock plans (in shares) | 676 |  |  |  |  |
Stock-based compensation |  | 17,592 |  |  |  | 17,592
Other comprehensive income (loss) |  |  | (1,239) |  |  | (1,239)
Net income (loss) |  |  |  | (92) |  | (92)
Balance at Dec. 31, 2017 | $ 35 | 331,073 | (591) | (192,183) | $ (132) | 138,202
Balance (in shares) at Dec. 31, 2017 | 34,647 |  |  |  | (28) |
Stockholders' Deficit |  |  |  |  |  |
Common stock issued under stock plans | $ 1 | 21,575 |  |  |  | 21,576
Common stock issued under stock plans (in shares) | 1,488 |  |  |  |  |
Stock-based compensation |  | 25,704 |  |  |  | 25,704
Other comprehensive income (loss) |  |  | 1,329 |  |  | 1,329
Net income (loss) |  |  |  | (12,951) |  | (12,951)
Balance at Dec. 31, 2018 | $ 36 | 378,352 | 738 | (205,134) | $ (132) | $ 173,860
Balance (in shares) at Dec. 31, 2018 | 36,135 |  |  |  | (28) | 36,107
Stockholders' Deficit |  |  |  |  |  |
Common stock issued under stock plans | $ 1 | 12,850 |  |  |  | $ 12,851
Common stock issued under stock plans (in shares) | 942 |  |  |  |  |
Issuance of common stock in connection with the Avedro Merger | $ 7 | 406,956 |  |  |  | 406,963
Issuance of common stock in connection with the Avedro Merger (in shares) | 6,453 |  |  |  |  |
Value of Replacement Awards issued in the Avedro Merger attributable to pre-combination services |  | 27,189 |  |  |  | 27,189
Stock-based compensation |  | 36,393 |  |  |  | 36,393
Other comprehensive income (loss) |  |  | 592 |  |  | 592
Net income (loss) |  |  |  | 15,424 |  | 15,424
Balance at Dec. 31, 2019 | $ 44 | $ 861,740 | $ 1,330 | $ (189,710) | $ (132) | $ 673,272
Balance (in shares) at Dec. 31, 2019 | 43,530 |  |  |  | (28) | 43,502

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