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Stock-Based Compensation (Tables) | 3 Months Ended
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Mar. 31, 2021
Share-based Payment Arrangement [Abstract] |
Activity in Stock Award Plans | The activity in the Stock Plan is displayed in the following table:
Authorized Shares Available for Future Award Grants | Three Months Ended March 31, 2021 |  | From Inception to March 31, 2021
Beginning balance | 700,680 |  |  | 1,900,000 |
Additional shares authorized | — |  |  | 1,500,000 |
Number of awards granted | (153,260) |  |  | (3,442,159) |
Number of awards forfeited or expired | 32,169 |  |  | 621,748 |
Ending balance | 579,589 |  |  | 579,589 |
Number of option awards exercised | 4,500 |  |  | 1,478,589 |
Number of unrestricted stock awards granted | — |  |  | 10,090 |
Number of restricted stock awards vested | 51,902 |  |  | 216,280 |
The activity in the Director Stock Plan is displayed in the following table:
Authorized Shares Available for Future Award Grants | Three Months Ended March 31, 2021 |  | From Inception to March 31, 2021
Beginning balance | 160,135 |  |  | 300,000 |
Additional authorization | — |  |  | 150,000 |
Number of awards granted | — |  |  | (313,868) |
Number of awards forfeited or expired | 2,727 |  |  | 26,730 |
Ending balance | 162,862 |  |  | 162,862 |
Number of option awards exercised | 8,181 |  |  | 142,001 |
Number of restricted stock awards vested | — |  |  | 98,491 |
Remaining Stock-Based Compensation Expense | We expect this compensation to be recognized over the remainder of 2021 and subsequent years according to the table below, except with respect to awards that are accelerated by the Board of Directors, in which case we will recognize any remaining compensation expense in the period in which the awards are accelerated.
2021 |  | $ | 2,565 |
2022 |  | 2,216 |
2023 |  | 1,372 |
2024 |  | 231 |
2025 |  | 12 |
Total |  | $ | 6,396 |

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- Definition Tabular disclosure of cost not yet recognized and weighted-average period over which cost is expected to be recognized for nonvested award under share-based payment arrangement. + 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 (i) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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