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Loss per Share | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2022 | Dec. 31, 2021
Earnings Per Share [Abstract] |  |
LOSS PER SHARE | 15. LOSS PER SHARE Basic loss per share is computed by dividing net loss by the weighted-average number of common shares outstanding during the year. Diluted loss per share is computed by dividing net loss by the weighted-average number of common shares and dilutive potential common shares outstanding during the three months ended March 31, 2022 and 2021.
|  | For the Three Months Ended |
|  | March 31, 2022 |  |  | March 31, 2021 |
Numerator: |  |  |  |  |  |
Net loss attributable to ABVC’s common stockholders |  | $ | (5,995,440 | ) |  | $ | (1,128,505 | )
Denominator: |  |  |  |  |  |  |  |
Weighted-average shares outstanding: |  |  |  |  |  |  |  |
Weighted-average shares outstanding - Basic |  |  | 29,683,402 |  |  |  | 24,420,526 |
Stock options |  |  | – |  |  |  | – |
Weighted-average shares outstanding - Diluted |  |  | 29,683,402 |  |  |  | 24,420,526 |
Loss per share |  |  |  |  |  |  |  |
-Basic |  | $ | (0.20 | ) |  | $ | (0.05 | )
-Diluted |  | $ | (0.20 | ) |  | $ | (0.05 | )
Diluted loss per share takes into account the potential dilution that could occur if securities or other contracts to issue Common Stock were exercised and converted into Common Stock. | 15. LOSS PER SHARE Basic loss per share is computed by dividing net loss by the weighted-average number of common shares outstanding during the year. Diluted loss per share is computed by dividing net loss by the weighted-average number of common shares and dilutive potential common shares outstanding during the year ended December 31, 2021 and 2020.
|  | For the Year Ended |
|  | December 31, 2021 |  |  | December 31, 2020 |
Numerator: |  |  |  |  |  |
Net loss attributable to ABVC’s common stockholders |  | $ | (12,838,813 | ) |  | $ | (9,791,164 | )
Denominator: |  |  |  |  |  |  |  |
Weighted-average shares outstanding: |  |  |  |  |  |  |  |
Weighted-average shares outstanding - Basic |  |  | 25,053,522 |  |  |  | 19,715,559 |
Stock options |  |  |  |  |  |  |  |
Weighted-average shares outstanding - Diluted |  |  | 25,053,522 |  |  |  | 19,715,559 |
Loss per share |  |  |  |  |  |  |  |
-Basic |  | $ | (0.51 | ) |  | $ | (0.50 | )
-Diluted |  | $ | (0.51 | ) |  | $ | (0.50 | )
Diluted loss per share takes into account the potential dilution that could occur if securities or other contracts to issue Common Stock were exercised and converted into Common Stock.

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- Definition The entire disclosure for earnings per share. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 3 -URI https://asc.fasb.org/extlink&oid=109243012&loc=SL65017193-207537 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI https://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -URI https://asc.fasb.org/topic&trid=2144383 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 2 -URI https://asc.fasb.org/extlink&oid=124432515&loc=d3e3630-109257 + Details
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