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Net Income (Loss) per Share (Tables) | 12 Months Ended
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Dec. 31, 2022
Net Income (Loss) per Share |
Reconciliation of numerators and denominators of basic and diluted net income per share | A reconciliation of the numerators and denominators of the basic and diluted net income per share calculations is as follows (in thousands, except per share data):
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Year ended | ​
​ | ​ | December 31, | ​
​ |  | 2022 |  | 2021 |  | 2020 |
Numerator: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Net income attributable to AXT, Inc. | ​ | $ | 15,811 | ​ | $ | 14,575 | ​ | $ | 3,238 | ​
Less: Preferred stock dividends | ​ |  | (177) | ​ |  | (177) | ​ |  | (177) | ​
Net income available to common stockholders | ​ | $ | 15,634 | ​ | $ | 14,398 | ​ | $ | 3,061 | ​
Denominator: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Denominator for basic net income per share - weighted-average common shares | ​ |  | 42,104 | ​ |  | 41,367 | ​ |  | 40,152 | ​
Effect of dilutive securities: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Common stock options | ​ |  | 333 | ​ |  | 803 | ​ |  | 602 | ​
Restricted stock awards | ​ |  | 278 | ​ |  | 550 | ​ |  | 271 | ​
Denominator for dilutive net income per common shares | ​ |  | 42,715 | ​ |  | 42,720 | ​ |  | 41,025 | ​
Net income attributable to AXT, Inc. per common share: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Basic | ​ | $ | 0.37 | ​ | $ | 0.35 | ​ | $ | 0.08 | ​
Diluted | ​ | $ | 0.37 | ​ | $ | 0.34 | ​ | $ | 0.07 | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Options excluded from diluted net income per share as the impact is anti-dilutive | ​ |  | 220 | ​ |  | 21 | ​ |  | 862 | ​
Restricted stock excluded from diluted net income per share as the impact is anti-dilutive | ​ |  | 291 | ​ |  | 118 | ​ |  | 161 | ​

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257 + Details
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