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Equity Incentive and Employee Stock Purchase Plan (Tables) | 3 Months Ended
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Mar. 31, 2023
Share-Based Payment Arrangement [Abstract] |
Restricted Stock Award Activity | Restricted stock activity for the three months ended March 31, 2023 is set forth below:
| Shares |  | Weighted-Average Grant-Date Fair Value
Nonvested at January 1, 2023 | 35,416 |  |  | $ | 38.42 |
Granted | — |  |  | — |
Vested | (9,615) |  |  | 37.97 |
Canceled | — |  |  | — |
Nonvested at March 31, 2023 | 25,801 |  |  | $ | 38.59 |
Restricted Stock Unit Award Activity | Restricted stock unit activity for the three months ended March 31, 2023 is set forth below:
| Number of Shares |  | Weighted-Average Grant-Date Fair Value |  | Weighted-Average Remaining Contractual Life (in years) |  | Aggregate Intrinsic Value
Outstanding at January 1, 2023 | 1,082,451 |  | $ | 51.63 |  |  |  |  |
Granted | 41,754 |  |  | 59.50 |  |  |  |  |
Vested | (24,840) |  |  | 48.85 |  |  |  |  |
Canceled | (8,177) |  |  | 56.53 |  |  |  |  |
Outstanding at March 31, 2023 | 1,091,188 |  |  | $ | 51.95 |  |  | 3.6 |  | $ | 37,198,599 |
Vested and expected to vest at March 31, 2023 | 727,674 |  |  | $ | 53.10 |  |  | 3.1 |  | $ | 24,806,395 |
Employee Stock Purchase Plan, Valuation Assumptions | The compensation expense related to the current offering period of the Purchase Plan has been estimated utilizing the following assumptions:
| March 31, 2023 |  |
Risk-free interest rate | 4.54% |  |
Expected term (in years) | 0.5 |  |
Dividend yield | 0.00% |  |
Expected volatility | 48.19% |  |
Weighted average volatility | 48.19% |  |

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- Definition Tabular disclosure of the number and weighted-average grant date fair value for restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock units that were granted, vested, or forfeited during the year. + 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 (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 employee stock purchase plans, including, but not limited to: (a) expected term, (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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- Definition Disclosure of the number and weighted-average grant date fair value for restricted stock and restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock and restricted stock units that were granted, vested, or forfeited during the year. + References No definition available. + Details
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