Stock-Based Compensation (Tables)
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9 Months Ended |
Sep. 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 nine months ended September 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 | (742,068) | | | 12.73 | | | | | | | | | | | | | | | Outstanding at September 30, 2026 | 3,730,494 | | | 12.78 | | | 4.36 | | — | | | Exercisable at September 30, 2026 | 3,656,762 | | | 12.90 | | | 4.32 | | — | | | Vested and expected to vest at September 30, 2026 | 3,730,300 | | | 12.78 | | | 4.36 | | — | |
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| Schedule of RSU Activity |
A summary of RSU activity for the 2016 Plan for the nine months ended September 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 | 2,207,701 | | | 6.10 | | | Forfeited | (314,175) | | | 5.18 | | | Vested | (1,368,057) | | | 5.51 | | | Unvested at September 30, 2026 | 4,001,978 | | | 5.41 | |
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| Schedule of PSU Activity |
A summary of PSU activity for the 2016 Plan for the nine months ended September 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 September 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 nine months ended September 30, 2026 and 2025 was comprised of the following: | | | | | | | | | | | | | | | | | | | | | | | | | Three Months Ended | | Nine Months Ended | | (in thousands) | September 30,
2026 | | September 30,
2025 | | September 30,
2026 | | September 30,
2025 | | Research and development | $ | 613 | | | $ | 458 | | | $ | 1,797 | | | $ | 1,819 | | | Selling, general and administrative | 1,726 | | | 1,654 | | | 5,212 | | | 5,370 | | | Total stock-based compensation expense | $ | 2,339 | | | $ | 2,112 | | | $ | 7,009 | | | $ | 7,189 | |
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| Schedule of Mote Carlo Model for PSUs Granted |
Assumptions used in the Monte Carlo model for PSUs granted during the nine months ended September 30, 2026 were as follows: | | | | | | | | | Nine Months Ended | | September 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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