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Net Income (Loss) Per Share | 6 Months Ended
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Jun. 30, 2020
Net Income (Loss) Per Share |
Net Income (Loss) Per Share | Note 10. Net Income (Loss) Per Share ​ Basic net income (loss) per share is computed using the weighted-average number of common shares outstanding during the periods less shares of common stock subject to repurchase and non-vested stock awards. Diluted net income (loss) per share is computed using the weighted-average number of common shares outstanding and potentially dilutive common shares outstanding during the periods. The dilutive effect of outstanding stock options and restricted stock awards is reflected in diluted earnings per share by application of the treasury stock method. Potentially dilutive common shares consist of common shares issuable upon the exercise of stock options and vesting of restricted stock awards. Potentially dilutive common shares are excluded from the computation of weighted-average number of common shares outstanding in net loss years, as their effect would be anti-dilutive to the computation. ​ A reconciliation of the numerators and denominators of the basic and diluted net loss per share calculations is as follows (in thousands, except per share data):
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended | ​ | Six Months Ended | ​
​ | ​ | June 30, | ​ | June 30, | ​
​ |  | 2020 |  | 2019 |  | 2020 |  | 2019 |
Numerator: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Net income attributable to AXT, Inc. | ​ | $ | 361 | ​ | $ | 1,451 | ​ | $ | 183 | ​ | $ | 347 | ​
Less: Preferred stock dividends | ​ |  | (44) | ​ |  | (44) | ​ |  | (88) | ​ |  | (88) | ​
Net income available to common stockholders | ​ | $ | 317 | ​ | $ | 1,407 | ​ | $ | 95 | ​ | $ | 259 | ​
Denominator: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Denominator for basic net income per share - weighted-average common shares | ​ |  | 39,973 | ​ |  | 39,447 | ​ |  | 39,891 | ​ |  | 39,399 | ​
Effect of dilutive securities: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Common stock options | ​ |  | 552 | ​ |  | 624 | ​ |  | 478 | ​ |  | 602 | ​
Restricted stock awards | ​ |  | 225 | ​ |  | 52 | ​ |  | 174 | ​ |  | 44 | ​
Denominator for dilutive net income per common shares | ​ |  | 40,750 | ​ |  | 40,123 | ​ |  | 40,543 | ​ |  | 40,045 | ​
Net income attributable to AXT, Inc. per common share: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Basic | ​ | $ | 0.01 | ​ | $ | 0.04 | ​ | $ | 0.00 | ​ | $ | 0.01 | ​
Diluted | ​ | $ | 0.01 | ​ | $ | 0.04 | ​ | $ | 0.00 | ​ | $ | 0.01 | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Options excluded from diluted net income per share as the impact is anti-dilutive | ​ |  | 1,270 | ​ |  | 1,280 | ​ |  | 1,701 | ​ |  | 1,284 | ​
Restricted stock excluded from diluted net income per share as the impact is anti-dilutive | ​ |  | 343 | ​ |  | 568 | ​ |  | 436 | ​ |  | 550 | ​
​ The 883,000 shares of $0.001 par value Series A preferred stock issued and outstanding as of June 30, 2020 and December 31, 2019, valued at $3,532,000, are non-voting and non-convertible preferred stock with a 5.0% cumulative annual dividend rate payable when declared by the board of directors and a $4 per share liquidation preference over common stock, which must be paid before any distribution is made to common stockholders. These preferred shares were issued to Lyte Optronics, Inc. stockholders in connection with the completion of our acquisition of Lyte Optronics, Inc. on May 28, 1999.

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- Definition The entire disclosure for earnings per share. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -URI http://asc.fasb.org/topic&trid=2144383 + Details
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