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Stock-Based Compensation (Tables) | 9 Months Ended
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Sep. 30, 2022
Share-Based Payment Arrangement [Abstract] |
Stock Options Activity | Stock option awards outstanding as of September 30, 2022 and changes during the period ended September 30, 2022 were as follows:
| Shares under option (thousands) |  | Weighted average exercise price |  | Weighted average remaining contractual term (years) |  | Aggregate intrinsic value (thousands)
Outstanding at January 1, 2022 | 3,848 |  |  | $ | 6.55 |  |  | 6.16 |  | $ | 27,796 |
Vested and expecting to vest at January 1, 2022 | 3,848 |  |  | 6.55 |  |  | 6.16 |  | 27,796 |
Exercisable at January 1, 2022 | 2,479 |  |  | $ | 6.31 |  |  | 4.85 |  | $ | 18,499 |
Exercised | (3) |  |  | 6.75 |  |  | — |  |  | — |
Cancelled/forfeited | (38) |  |  | 9.55 |  |  | — |  |  | 188 |
Expired | (1) |  |  | 6.61 |  |  | — |  |  | 4 |
Outstanding at September 30, 2022 | 3,806 |  |  | $ | 6.52 |  |  | 5.39 |  | $ | 42,032 |
Vested and expecting to vest at September 30, 2022 | 3,806 |  |  | 6.52 |  |  | 5.39 |  | 42,032 |
Exercisable at September 30, 2022 | 2,918 |  |  | $ | 6.30 |  |  | 4.56 |  | $ | 32,874 |
Stock option awards outstanding as of December 31, 2021 and changes during the year ended December 31, 2021 were as follows:
| Shares under option (thousands) |  | Weighted average exercise price |  | Weighted average remaining contractual term (years) |  | Aggregate intrinsic value (thousands)
Outstanding at January 1, 2021 | 4,283 |  |  | $ | 5.12 |  |  | 5.09 |  | $ | 2,582 |
Vested and expecting to vest at January 1, 2021 | 4,283 |  |  | 5.12 |  |  | 5.09 |  | 2,582 |
Exercisable at January 1, 2021 | 2,915 |  |  | $ | 5.02 |  |  | 3.47 |  | $ | 2,582 |
Granted | 620 |  |  | 9.33 |  |  | $ | — |  |  | — |
Exercised | (721) |  |  | 2.36 |  |  | $ | — |  |  | 1,741 |
Cancelled/forfeited/expired | (334) |  |  | 2.50 |  |  | $ | — |  |  | 755 |
Outstanding at December 31, 2021 | 3,848 |  |  | $ | 6.55 |  |  | 6.16 |  | $ | 27,796 |
Vested and expecting to vest at December 31, 2021 | 3,848 |  |  | 6.55 |  |  | 6.16 |  | 27,796 |
Exercisable at December 31, 2021 | 2,479 |  |  | $ | 6.31 |  |  | 4.85 |  | $ | 18,499 |
Schedule Stock Options Valuation Assumptions | The following table summarizes the weighted-average assumptions applied in the Black-Scholes valuation of options for awards subject to expense recognition for the first time in the period, for the years ended December 31, 2021 and 2020:
| Year Ended December 31,
| 2021 |  | 2020
Stock price | $ | 9.33 |  |  | $ | 4.68 |
Exercise price | 9.33 |  |  | 4.68 |
Expected term (years) | 6.1 |  | 6.4
Expected volatility | 98.0 | % |  | 100.6 | %
Risk-free interest rate | 1.09 | % |  | 0.56 | %
Dividend yield | — | % |  | — | %
Restricted Stock Awards Activity | RSAs as of December 31, 2021 and changes during the year ended December 31, 2021 were as follows:
| Nonvested Shares (thousands) |  | Weighted Average Fair Value
Outstanding at January 1, 2021 | 325 |  |  | $ | 4.68 |
Granted | 281 |  |  | 4.76 |
Forfeited | (26) |  |  | 4.68 |
Outstanding at December 31, 2021 | 580 |  |  | $ | 4.72 |

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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 https://asc.fasb.org/extlink&oid=128089324&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 https://asc.fasb.org/extlink&oid=128089324&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 https://asc.fasb.org/extlink&oid=128089324&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 https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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