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Stockholders' Equity (Tables) | 3 Months Ended
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Mar. 31, 2021
Stockholders' Equity |
Consolidated statements of changes in stockholders' equity | The changes in stockholders’ equity by component for the three months ended March 31, 2021 are as follows: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  |  |  |  |  |  |  |  |  | Accumulated | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Other | ​ | AXT, Inc. |  |  |  | Total | ​
​ |  | Preferred |  | Common |  | Additional |  | Accumulated |  | Comprehensive | ​ | Stockholders’ |  | Noncontrolling |  | Stockholders’ | ​
​ |  | Stock |  | Stock |  | Paid-In Capital |  | Deficit |  | Income (Loss) |  | Equity |  | Interests |  | Equity |
Balance as of December 31, 2020 |  | $ | 3,532 |  | $ | 42 |  | $ | 230,381 |  | $ | (44,545) |  | $ | 3,209 | ​ | $ | 192,619 |  | $ | 15,350 |  | $ | 207,969 | ​
Common stock options exercised | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 704 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 704 | ​ | ​ | — | ​ | ​ | 704 | ​
Stock-based compensation | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 816 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 816 | ​ | ​ | — | ​ | ​ | 816 | ​
Formation of new subsidiary with noncontrolling interests | ​ | ​ | — | ​ | ​ | — | ​ | ​ | (131) | ​ | ​ | — | ​ | ​ | — | ​ | ​ | (131) | ​ | ​ | 707 | ​ | ​ | 576 | ​
Sale of common stock to employees in connection with the reorganization | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 538 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 538 | ​ | ​ | — | ​ | ​ | 538 | ​
Purchase of subsidiary shares from noncontrolling interests | ​ | ​ | — | ​ | ​ | — | ​ | ​ | (2,691) | ​ | ​ | — | ​ | ​ | — | ​ | ​ | (2,691) | ​ | ​ | (1,039) | ​ | ​ | (3,730) | ​
Net income (loss) | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 3,425 | ​ | ​ | — | ​ | ​ | 3,425 | ​ | ​ | 311 | ​ | ​ | 3,736 | ​
Other comprehensive loss | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | (131) | ​ | ​ | (131) | ​ | ​ | (16) | ​ | ​ | (147) | ​
Balance as of March 31, 2021 | ​ | $ | 3,532 | ​ | $ | 42 | ​ | $ | 229,617 | ​ | $ | (41,120) | ​ | $ | 3,078 | ​ | $ | 195,149 | ​ | $ | 15,313 | ​ | $ | 210,462 | ​
​ The changes in stockholders’ equity by component for the three months ended March 31, 2020 are as follows: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  |  |  |  |  |  |  |  |  | Accumulated | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Other | ​ | AXT, Inc. |  |  |  | Total
​ |  | Preferred |  | Common |  | Additional |  | Accumulated |  | Comprehensive | ​ | Stockholders’ |  | Noncontrolling |  | Stockholders’
​ |  | Stock |  | Stock |  | Paid-In Capital |  | Deficit |  | Income (Loss) |  | Equity |  | Interests |  | Equity
Balance as of December 31, 2019 |  | $ | 3,532 |  | $ | 41 |  | $ | 236,957 |  | $ | (47,783) |  | $ | (4,862) | ​ | $ | 187,885 |  | $ | 4,877 |  | $ | 192,762
Common stock options exercised | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 441 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 441 | ​ | ​ | — | ​ | ​ | 441
Stock-based compensation | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 643 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 643 | ​ | ​ | — | ​ | ​ | 643
Net income (loss) | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | (178) | ​ | ​ | — | ​ | ​ | (178) | ​ | ​ | 395 | ​ | ​ | 217
Other comprehensive loss | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | (1,775) | ​ | ​ | (1,775) | ​ | ​ | (98) | ​ | ​ | (1,873)
Balance as of March 31, 2020 | ​ | $ | 3,532 | ​ | $ | 41 | ​ | $ | 238,041 | ​ | $ | (47,961) | ​ | $ | (6,637) | ​ | $ | 187,016 | ​ | $ | 5,174 | ​ | $ | 192,190

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- Definition Tabular disclosure of changes in the separate accounts comprising stockholders' equity (in addition to retained earnings) and of the changes in the number of shares of equity securities during at least the most recent annual fiscal period and any subsequent interim period presented is required to make the financial statements sufficiently informative if both financial position and results of operations are presented. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21463-112644 + Details
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- References No definition available. + Details
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