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Stockholders' Equity (Tables) | 3 Months Ended
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Mar. 31, 2024
Equity [Abstract] |
Stock-Based Compensation Expense | The following table presents stock-based compensation expense in the Company’s condensed consolidated statements of comprehensive (loss) income:
|  | Three Months Ended March 31, |
|  | 2024 |  |  | 2023 |
|  | (Amounts in thousands) |
Cost of goods sold |  | $ | 604 |  |  | $ | 591 |
Research and development |  |  | 944 |  |  |  | 787 |
Selling, general and administrative |  |  | 7,228 |  |  |  | 5,876 |
Total stock-based compensation |  | $ | 8,776 |  |  | $ | 7,254 |
Summary of Option Activity | Information regarding option activity for the three months ended March 31, 2024 under the Plans is summarized below:
|  | Shares |  |  | Weighted average exercise price |  |  | Weighted- Average Remaining Contractual Term (in Years) |  |  | Aggregate Intrinsic Value (in Thousands) |
Options outstanding at December 31, 2023 |  |  | 649,130 |  |  | $ | 85.97 |  |  |  |  |  |  |
Granted |  |  | 39,528 |  |  | $ | 192.80 |  |  |  |  |  |  |
Exercised |  |  | (13,708 | ) |  | $ | 68.95 |  |  |  |  |  |  |
Forfeited/expired/cancelled |  |  | (10,970 | ) |  | $ | 77.70 |  |  |  |  |  |  |
Options outstanding at March 31, 2024 |  |  | 663,980 |  |  | $ | 92.81 |  |  |  |  |  |  |
Options exercisable at March 31, 2024 |  |  | 400,302 |  |  | $ | 71.62 |  |  |  |  |  |  |
Vested and expected to vest at March 31, 2024(1) |  |  | 650,402 |  |  | $ | 92.21 |  |  |  | 5.67 |  |  | $ | 61,471 |
(1) Represents the number of vested options as of March 31, 2024 plus the number of unvested options expected to vest as of March 31, 2024 based on the unvested outstanding options at March 31, 2024 adjusted for estimated forfeiture rates of 8% for awards granted to non-executive level employees and 3% for awards granted to executive level employees.
Summary of Restricted Stock Unit Activity | Information regarding stock unit activity, which includes activity for restricted stock units and performance stock units, for the three months ended March 31, 2024 under the Plans is summarized below:
|  | Shares |  |  | Weighted Average Grant Date Fair Value |  |
Unvested at December 31, 2023 |  |  | 474,320 |  |  | $ | 155.59 |  |
Awarded |  |  | 152,483 |  |  | $ | 192.59 |  |
Vested |  |  | (98,246 | ) |  | $ | 148.67 |  |
Forfeited/cancelled |  |  | (20,968 | ) |  | $ | 186.59 |  |
Unvested at March 31, 2024 |  |  | 507,589 |  |  | $ | 166.78 |  |
Vested and expected to vest at March 31, 2024(1) |  |  | 444,179 |  |  | $ | 165.03 |  |
(1) Represents the number of vested stock units as of March 31, 2024 plus the number of unvested stock units expected to vest as of March 31, 2024 based on the unvested outstanding stock units at March 31, 2024 adjusted for estimated forfeiture rates of 8% for awards granted to non-executive level employees and 3% for awards granted to executive level employees.

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