Stock-Based Compensation (Tables)
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6 Months Ended |
Jun. 30, 2026 |
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| Share-Based Payment Arrangement [Abstract] |
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| Schedule of Option Activity |
A summary of option activity under the Plans for the six months ended June 30, 2026 follows: | | | | | | | | | | | | | | | | | | | | | | | | | (in thousands, except for share and per share amounts) | Number of
Shares | | Weighted Average
Exercise Price at
Grant Date | | Weighted Average
Remaining Term
(Years) | | Aggregate
Intrinsic
Value | | Outstanding at December 31, 2025 | 4,490,324 | | | $ | 12.75 | | | 4.74 | | $ | 2,698 | | | | | | | | | | | Forfeited | (17,762) | | | 7.05 | | | | | | | Expired | (297,330) | | | 8.09 | | | | | | | | | | | | | | | Outstanding at June 30, 2026 | 4,175,232 | | | 13.10 | | | 4.56 | | 136 | | | Exercisable at June 30, 2026 | 4,057,908 | | | 13.28 | | | 4.50 | | 136 | | | Vested and expected to vest at June 30, 2026 | 4,174,450 | | | 13.11 | | | 4.56 | | 136 | |
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| Schedule of RSU Activity |
A summary of RSU activity for the 2016 Plan for the six months ended June 30, 2026 is as follows: | | | | | | | | | | | | | Number of
Shares | | Weighted Average Grant Date Fair Value | | Unvested at December 31, 2025 | 3,476,509 | | | $ | 4.99 | | | Granted | 2,183,701 | | | 6.10 | | | Forfeited | (304,675) | | | 5.19 | | | Vested | (1,353,057) | | | 5.50 | | | Unvested at June 30, 2026 | 4,002,478 | | | 5.41 | |
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| Schedule of PSU Activity |
A summary of PSU activity for the 2016 Plan for the six months ended June 30, 2026, based on award at target, is as follows: | | | | | | | | | | | | | Number of
Shares | | Weighted Average Grant Date Fair Value | | Unvested at December 31, 2025 | — | | | $ | — | | | Granted | 405,000 | | | 8.03 | | | Forfeited | (40,000) | | | 8.03 | | | | | | | Unvested at June 30, 2026 | 365,000 | | | 8.03 | |
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| Schedule of Stock-Based Compensation Expense |
Stock-based compensation expense recognized for the three and six months ended June 30, 2026 and 2025 was comprised of the following: | | | | | | | | | | | | | | | | | | | | | | | | | Three Months Ended | | Six Months Ended | | (in thousands) | June 30,
2026 | | June 30,
2025 | | June 30,
2026 | | June 30,
2025 | | Research and development | $ | 583 | | | $ | 596 | | | $ | 1,184 | | | $ | 1,361 | | | Selling, general and administrative | 1,524 | | | 1,510 | | | 3,486 | | | 3,716 | | | Total stock-based compensation expense | $ | 2,107 | | | $ | 2,106 | | | $ | 4,670 | | | $ | 5,077 | |
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| Schedule of Mote Carlo Model for PSUs Granted |
Assumptions used in the Monte Carlo model for PSUs granted during the six months ended June 30, 2026 were as follows: | | | | | | | | | Six Months Ended | | June 30, 2026 | | | | | | | | Expected dividend yield | — | % | | | Expected volatility of the Company | 61 | % | | | Remaining performance period (years) | 2.87 | | | Risk-free rate | 3.44 | % | | |
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