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Stock-Based Compensation (Tables) | 3 Months Ended
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Mar. 31, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Summary of Assumptions in the Binomial Option-Pricing Model Used to Determine The Fair Value of Stock Options | The following table presents the weighted-average assumptions used to value options granted during the three months ended March 31, 2020:
2022: Expected term |  |  | 6.0 years |
Risk-free interest rate |  |  | 0.9 | %
Expected dividend yield |  |  | 0.0 | %
Expected volatility |  |  | 60.7 | %
Summary of Stock Option Activity | Activity with respect to stock options is summarized as follows:
|  | Shares |  |  | Weighted- Average Exercise Price |
Options outstanding, January 1, 2022 |  |  | 34,709,027 |  |  | $ | 0.64 |
Granted |  |  | — |  |  | $ | — |
Exercised |  |  | (3,336,683 | ) |  | $ | 0.45 |
Forfeited |  |  | (459,787 | ) |  | $ | 0.66 |
Expired |  |  | (2,595 | ) |  | $ | 0.69 |
Options outstanding, March 31, 2022 |  |  | 30,909,962 |  |  | $ | 0.66 |
Nonvested options, March 31, 2022 |  |  | 22,213,714 |  |  | $ | 0.71 |
Vested and exercisable, March 31, 2022 |  |  | 9,140,656 |  |  | $ | 0.53 |
Chief Executive Officer [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Summary of Assumptions in the Binomial Option-Pricing Model Used to Determine The Fair Value of Stock Options | The following table presents the key inputs and assumptions used to value the options granted to the Chief Executive Officer on the grant date:
Remaining term |  |  | 10.0 years |
Risk-free interest rate |  |  | 1.5 | %
Expected dividend yield |  |  | 0.0 | %
Expected volatility |  |  | 40.0 | %

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- Definition Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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