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Stock-based Compensation (Tables) | 3 Months Ended
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Mar. 31, 2024
Share-Based Payment Arrangement [Abstract] |
Stock Option Activity | The activity for the Company’s 2014 Plan and 2015 Plan, for the three months ended March 31, 2024, is summarized as follows:
|  | Number of Shares |  |  | Weighted- Average Exercise Price |  |  | Weighted- Average Remaining Contractual Life (in years) |  |  | Aggregate Intrinsic Value ($000) |
Outstanding — December 31, 2023 |  |  | 1,867,795 |  |  | $ | 10.72 |  |  |  | 6.10 |  |  | $ | 184 |
Granted |  |  | 862,060 |  |  | $ | 1.86 |  |  |  |  |  |  |
Forfeited/Cancelled |  |  | (13,253 | ) |  | $ | 7.84 |  |  |  |  |  |  |
Outstanding — March 31, 2024 |  |  | 2,716,602 |  |  | $ | 7.92 |  |  |  | 7.11 |  |  | $ | — |
Exercisable — March 31, 2024 |  |  | 1,389,304 |  |  | $ | 13.35 |  |  |  | 4.99 |  |  | $ | — |
Vested or expected to vest — March 31, 2024 |  |  | 2,716,602 |  |  | $ | 7.92 |  |  |  | 7.11 |  |  | $ | — |
Schedule of Restricted Stock Units ("RSU") Activity | Restricted stock unit (“RSU”) activity under the 2014 Plan and 2015 Plan for the three months ended March 31, 2024, is summarized as follows:
|  | Number of Shares |  |  | Weighted Average Grant Date Fair Value Per Share |
Non-vested at December 31, 2023 |  |  | 1,886,374 |  |  | $ | 2.28 |
Granted |  |  | 1,877,940 |  |  | $ | 1.88 |
Vested |  |  | (553,182 | ) |  | $ | 3.03 |
Forfeited |  |  | (9,120 | ) |  | $ | 2.15 |
Non-vested at March 31, 2024 |  |  | 3,202,012 |  |  | $ | 1.91 |
Stock-Based Compensation Expense Related to Stock Options | Stock-based compensation expense related to stock options is included in the following line items in the accompanying unaudited condensed consolidated statements of operations (in thousands):
|  | Three Months Ended March 31, |
|  | 2024 |  |  | 2023 |
Research and development |  | $ | 195 |  |  | $ | 374 |
Selling, general and administrative |  |  | 510 |  |  |  | 333 |
Total |  | $ | 705 |  |  | $ | 707 |

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- Definition Tabular disclosure of allocation of amount expensed and capitalized for award under share-based payment arrangement to statement of income or comprehensive income and statement of financial position. Includes, but is not limited to, corresponding line item in financial statement. + 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 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 -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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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 -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (d) -SubTopic 10 -Topic 718 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (e) -SubTopic 10 -Topic 718 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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