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Stockholders' Equity (Tables) | 3 Months Ended
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Mar. 31, 2022
Stockholders' Equity |
Consolidated statements of stockholders' equity | The changes in stockholders’ equity by component for the three months ended March 31, 2022 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, 2021 |  | $ | 3,532 |  | $ | 43 |  | $ | 231,622 |  | $ | (29,970) |  | $ | 6,302 | ​ | $ | 211,529 |  | $ | 18,317 |  | $ | 229,846 | ​
Investment in subsidiary with noncontrolling interest | ​ | ​ | — | ​ | ​ | — | ​ | ​ | (410) | ​ | ​ | — | ​ | ​ | — | ​ | ​ | (410) | ​ | ​ | 204 | ​ | ​ | (206) | ​
Noncontrolling interest portion of Tongmei stock-based compensation | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 17 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 17 | ​ | ​ | (7) | ​ | ​ | 10 | ​
Stock-based compensation | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 875 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 875 | ​ | ​ | — | ​ | ​ | 875 | ​
Tongmei stock-based compensation | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 213 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 213 | ​ | ​ | — | ​ | ​ | 213 | ​
Net income | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 3,165 | ​ | ​ | — | ​ | ​ | 3,165 | ​ | ​ | 389 | ​ | ​ | 3,554 | ​
Investment in subsidiary from noncontrolling interest | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 1,887 | ​ | ​ | 1,887 | ​
Other comprehensive income | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 327 | ​ | ​ | 327 | ​ | ​ | 45 | ​ | ​ | 372 | ​
Balance as of March 31, 2022 |  | $ | 3,532 | ​ | $ | 43 | ​ | $ | 232,317 | ​ | $ | (26,805) | ​ | $ | 6,629 | ​ | $ | 215,716 | ​ | $ | 20,835 | ​ | $ | 236,551 | ​
​ Net income and other comprehensive income attributable to redeemable noncontrolling interests was $418,000 and $46,000, respectively, not shown in the table above. 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

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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=123467817&loc=d3e21463-112644 + Details
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