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Net Income Per Share (Tables) | 9 Months Ended
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Sep. 30, 2021
Earnings Per Share [Abstract] |
Reconciliation of net income loss available to common stockholders | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Three Months Ended | ​ | Nine Months Ended
​ | ​ | September 30 | ​ | September 30
​ |  | 2021 |  | 2020 |  | 2021 |  | 2020
Basic net income per common share: | ​ | ​ | ​ | ​ | ​
Numerator: |  |  | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Net income |  | $ | 16,796 | ​ | $ | 4,822 | ​ | $ | 50,689 | ​ | $ | 7,387
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Denominator: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Weighted-average shares used in computing basic net income per share attributable to common stockholders |  | ​ | 89,571,226 | ​ | ​ | 86,265,297 | ​ | ​ | 88,594,135 | ​ | ​ | 85,364,608
Basic net income per share attributable to common stockholders | ​ | $ | 0.19 | ​ | $ | 0.06 | ​ | $ | 0.57 | ​ | $ | 0.09
​ |  | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Diluted net income per common share: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Numerator: |  | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Net income attributable to common stockholders |  | $ | 16,796 | ​ | $ | 4,822 | ​ | $ | 50,689 | ​ | $ | 7,387
Diluted net income attributable to common stockholders | ​ | $ | 16,796 | ​ | $ | 4,822 | ​ | $ | 50,689 | ​ | $ | 7,387
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Denominator: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Weighted-average shares used in computing basic net income per share attributable to common stockholder |  | ​ | 89,571,226 | ​ | ​ | 86,265,297 | ​ | ​ | 88,594,135 | ​ | ​ | 85,364,608
Effect of dilutive securities | ​ | ​ | 10,799,105 | ​ | ​ | 12,704,291 | ​ | ​ | 11,732,086 | ​ | ​ | 13,571,881
Weighted-average shares used in computing diluted net income per share attributable to common stockholders |  | ​ | 100,370,331 | ​ | ​ | 98,969,588 | ​ | ​ | 100,326,221 | ​ | ​ | 98,936,489
Diluted net income per share attributable to common stockholders | ​ | $ | 0.17 | ​ | $ | 0.05 | ​ | $ | 0.51 | ​ | $ | 0.07
Antidilutive securities excluded from computation of earnings per share | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended | ​ | ​ | Nine Months Ended
​ | ​ | September 30, | ​ | ​ | September 30,
​ | ​ | 2021 |  | 2020 | ​ | ​ | 2021 |  | 2020
Options to purchase common stock | ​ | 1,165,092 |  | 721,202 | ​ | ​ | 860,650 |  | 517,743
Shares issuable under ESPP | ​ | 1,082 | ​ | 2,451 | ​ | ​ | 140 | ​ | 428
Restricted stock units | ​ | 74,123 | ​ | 13,829 | ​ | ​ | 28,654 | ​ | 59,876
Total | ​ | 1,240,297 |  | 737,482 | ​ | ​ | 889,444 |  | 578,047
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​

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- Definition Tabular disclosure of securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) in the future that were not included in the computation of diluted EPS because to do so would increase EPS amounts or decrease loss per share amounts for the period presented, by antidilutive securities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257 + Details
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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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