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Stock-Based Compensation (Tables) | 12 Months Ended
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Dec. 31, 2022
Share-Based Payment Arrangement [Abstract] |
Stock Options, Valuation Assumptions | The weighted average assumptions used in our Black-Scholes option pricing model for options granted in 2022, 2021 and 2020 were as follows:
|  | 2022 | 2021 |  | 2020
Dividend yield |  | 0.40% - 0.56% | 0.32% - 0.35% |  | 0.44% - 3.77%
Expected volatility |  | 58.14 | % | 61.62 | % |  | 50.00 | %
Risk-free interest rate |  | 1.93% - 2.89% | 1.10% - 1.21% |  | 0.37% - 1.22%
Expected term in years |  | 6.5 years | 6.5 years |  | 6.5 years
Stock Options, Activity | The following table summarizes activity related to stock options during 2022:
|  | Number of Options |  | Weighted- Average Exercise Price Per Share |  | Aggregate Intrinsic Value (thousands) |  | Weighted Average Remaining Term (Years)
Outstanding at December 31, 2021 |  | 1,616,720 |  |  | $ | 13.08 |  |  |  |  |
Granted |  | 447,562 |  |  | 9.68 |  |  |  |  |
Exercised |  | (25,000) |  |  | 9.02 |  |  |  |  |
Forfeited or expired |  | (149,115) |  |  | 13.40 |  |  |  |  |
Outstanding at December 31, 2022 |  | 1,890,167 |  |  | $ | 12.30 |  |  | $ | — |  |  | 7.1 years
Vested and Expected to vest as of December 31, 2022 |  | 1,890,167 |  |  | $ | 12.30 |  |  | $ | — |  |  | 7.1 years
Exercisable at December 31, 2022 |  | 1,460,664 |  |  | $ | 12.88 |  |  | $ | — |  |  | 6.6 years
A summary of the status and changes of stock options and the related average price per share follows:
|  | Number of Options |  | Weighted- Average Grant Date Fair Value
Outstanding unvested as of December 31, 2021 |  | 115,920 |  |  | $ | 6.64 |
Granted |  | 447,562 |  |  | 5.33 |
Vested |  | (49,936) |  |  | 6.40 |
Forfeited |  | (84,043) |  |  | 6.06 |
Outstanding unvested as of December 31, 2022 |  | 429,503 |  |  | $ | 5.42 |
Schedule of Nonvested Restricted Stock Units Activity | A summary of the status and changes of shares subject to RSU awards for employees and the related average price per share follows:
|  | Number of Shares |  | Weighted- Average Grant Date Fair Value
Outstanding unvested as of December 31, 2021 |  | 2,696 |  |  | $ | 13.96 |
Granted |  | 554,004 |  |  | 9.76 |
Cancelled |  | (78,035) |  |  | 10.08 |
Vested |  | (1,348) |  |  | 13.96 |
Outstanding unvested as of December 31, 2022 |  | 477,317 |  |  | $ | 9.72 |

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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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