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Net Income (Loss) per Share (Tables) | 12 Months Ended
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Dec. 31, 2021
Earnings Per Share [Abstract] |
Summary of Computation of Basic and Diluted Net Loss per Share | The following table summarizes the computation of basic and diluted net income (loss) per share (in thousands, except share and per share data):
| Year Ended December 31, |
| 2021 |  |  | 2020 |  |  | 2019 |
Numerator: |  |  |  |  |  |  |  |
Net income (loss) | $ | (4,431 | ) |  | $ | 1,225 |  |  | $ | 1,798 |
Denominator: |  |  |  |  |  |  |  |
Weighted-average shares outstanding, basic |  | 11,647,558 |  |  |  | 11,408,757 |  |  |  | 11,302,780 |
Weighted-average shares outstanding, diluted |  | 11,647,558 |  |  |  | 11,730,294 |  |  |  | 11,846,348 |
Net income (loss) per share, basic | $ | (0.38 | ) |  | $ | 0.11 |  |  | $ | 0.16 |
Net income (loss) per share, diluted | $ | (0.38 | ) |  | $ | 0.10 |  |  | $ | 0.15 |
Schedule of Anti-dilutive Shares Outstanding Excluded in Calculation of Diluted Net Income (Loss) per Share | The following potentially dilutive shares outstanding at the end of the periods presented were excluded in the calculation of diluted net income (loss) per share as the effect would have been anti-dilutive:
| Year Ended December 31, |
| 2021 |  |  | 2020 |  |  | 2019 |
Options to purchase common stock |  | 783,928 |  |  |  | 573,340 |  |  |  | 269,202 |
Unvested restricted stock units |  | 128,810 |  |  |  | 101,255 |  |  |  | 54,620 |
Total |  | 912,738 |  |  |  | 674,595 |  |  |  | 323,822 |

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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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