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Stockholders' Equity | 3 Months Ended
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Mar. 31, 2023
Stockholders' Equity |
Stockholders' Equity | Note 8. Stockholders’ Equity ​ Condensed Consolidated Statements of Stockholders’ Equity (in thousands) ​ The changes in stockholders’ equity by component for the three months ended March 31, 2023 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, 2022 |  | $ | 3,532 |  | $ | 44 |  | $ | 235,308 |  | $ | (14,159) |  | $ | (3,118) | ​ | $ | 221,607 |  | $ | 23,293 |  | $ | 244,900 | ​
Common stock options exercised | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 8 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 8 | ​ | ​ | — | ​ | ​ | 8 | ​
Investment in subsidiary with noncontrolling interest | ​ | ​ | — | ​ | ​ | — | ​ | ​ | (36) | ​ | ​ | — | ​ | ​ | — | ​ | ​ | (36) | ​ | ​ | 239 | ​ | ​ | 203 | ​
Investment in subsidiary with redeemable noncontrolling interest | ​ | ​ | — | ​ | ​ | — | ​ | ​ | (36) | ​ | ​ | — | ​ | ​ | — | ​ | ​ | (36) | ​ | ​ | — | ​ | ​ | (36) | ​
Noncontrolling interest portion of Tongmei stock-based compensation | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 33 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 33 | ​ | ​ | (16) | ​ | ​ | 17 | ​
Stock-based compensation | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 717 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 717 | ​ | ​ | — | ​ | ​ | 717 | ​
Tongmei stock-based compensation | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 198 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 198 | ​ | ​ | — | ​ | ​ | 198 | ​
Net loss | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | (3,348) | ​ | ​ | — | ​ | ​ | (3,348) | ​ | ​ | (169) | ​ | ​ | (3,517) | ​
Other comprehensive income | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 858 | ​ | ​ | 858 | ​ | ​ | 70 | ​ | ​ | 928 | ​
Balance as of March 31, 2023 | ​ | $ | 3,532 | ​ | $ | 44 | ​ | $ | 236,192 | ​ | $ | (17,507) | ​ | $ | (2,260) | ​ | $ | 220,001 | ​ | $ | 23,417 | ​ | $ | 243,418 | ​
​ Net loss and other comprehensive income attributable to redeemable noncontrolling interests were $149,000 and $70,000, respectively, for the three months ended March 31, 2023 and are not shown in the table above. 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 were $418,000 and $46,000, respectively, for the three months ended March 31, 2023 and are not shown in the table above. ​ There were no reclassification adjustments from accumulated other comprehensive income (loss) for the three months ended March 31, 2023 and 2022. ​ Stock Repurchase Program ​ On October 27, 2014, our Board of Directors approved a stock repurchase program pursuant to which we may repurchase up to $5.0 million of our outstanding common stock. These repurchases can be made from time to time in the open market and are funded from our existing cash balances and cash generated from operations. During 2015, we repurchased approximately 908,000 shares at an average price of $2.52 per share for a total purchase price of approximately $2.3 million under the stock repurchase program. No shares were repurchased from 2016 through 2022. During the three months ended March 31, 2023, we did no t repurchase any shares under the approved stock repurchase program. As of March 31, 2023, approximately $2.7 million remained available for future repurchases under this program. Currently, we do not plan to repurchase additional shares.

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- Definition The entire disclosure for shareholders' equity comprised of portions attributable to the parent entity and noncontrolling interest, including other comprehensive income. Includes, but is not limited to, balances of common stock, preferred stock, additional paid-in capital, other capital and retained earnings, accumulated balance for each classification of other comprehensive income and amount of comprehensive income. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123467817&loc=SL123496158-112644 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=123467817&loc=SL123496158-112644 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 14 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=123467817&loc=SL123496171-112644 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 14 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123467817&loc=SL123496171-112644 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=120397183&loc=d3e187085-122770 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 18 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=123467817&loc=SL123496189-112644 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 13 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=123467817&loc=SL123496158-112644 Reference 8: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -URI http://asc.fasb.org/topic&trid=2208762 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 18 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123467817&loc=SL123496189-112644 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 13 -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=123467817&loc=SL123496158-112644 Reference 11: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123467817&loc=SL123496171-112644 Reference 12: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 18 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123467817&loc=SL123496189-112644 Reference 13: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 16 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123467817&loc=SL123496180-112644 Reference 14: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 13 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=123467817&loc=SL123496158-112644 Reference 15: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(e)(1)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690 + Details
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