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Stock Compensation (Tables) | 6 Months Ended
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Jun. 30, 2023
Share-Based Payment Arrangement [Abstract] |
Schedule of Weighted-Average Assumptions Used to Determine the Fair Value of Options | The following weighted-average assumptions were used to determine the fair value of options and shares purchased under the ESPP:
| Three Months Ended June 30, 2023 |  | Six Months Ended June 30, 2023
| Stock Options |  | ESPP |  | Stock Options |  | ESPP
Expected life | 5.0 Years |  | 0.5 Years |  | 5.0 Years |  | 0.5 Years
Expected stock price volatility | 0.45 |  | 0.66 |  | 0.45 |  | 0.66
Risk-free interest rate | 3.94% |  | 4.77% |  | 3.94% |  | 4.77%
Summary of Total Stock Compensation Expenses | The following table summarizes total stock compensation expenses prior to the capitalization of amounts into Deferred preservation and Inventory costs (in thousands):
| Three Months Ended June 30, |  | Six Months Ended June 30,
| 2023 |  | 2022 |  | 2023 |  | 2022
RSA, RSU, and PSU expense | $ | 3,396 |  |  | $ | 2,470 |  |  | $ | 6,038 |  |  | $ | 5,238 |
Stock option and ESPP expense | 723 |  |  | 611 |  |  | 1,595 |  |  | 1,183 |
Total stock compensation expense | $ | 4,119 |  |  | $ | 3,081 |  |  | $ | 7,633 |  |  | $ | 6,421 |

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- Definition Tabular disclosure of cost recognized for award under share-based payment arrangement by plan. Includes, but is not limited to, related tax benefit. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + 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 -Topic 718 -SubTopic 10 -Subparagraph (f)(2) -Name Accounting Standards Codification -Paragraph 2 -Section 50 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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