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Stock-Based Compensation (Tables) | 6 Months Ended
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Jun. 30, 2023
Share-Based Payment Arrangement [Abstract] |
Schedule of Stock Option Activity | A summary of the stock option activity under our equity incentive plans is as follows:
| Number of Options |  | Weighted- Average Exercise Price |  | Weighted- Average Remaining Contractual Term (years) |  | Aggregate Intrinsic Value (in thousands)
Balance – December 31, 2022 | 2,599,264 |  |  | $ | 8.41 |  |  | 7.2 |  | $ | — |
Granted | — |  |  | — |  |  | — |  |  | — |
Exercised | — |  |  | — |  |  | — |  |  | — |
Forfeited and cancelled | (102,770) |  |  | $ | 22.14 |  |  | — |  |  | — |
Balance – June 30, 2023 | 2,496,494 |  |  | $ | 7.85 |  |  | 6.3 |  | $ | — |
Exercisable – June 30, 2023 | 2,260,042 |  |  | $ | 7.40 |  |  | 6.1 |  | $ | — |
Vested and expected to vest as of June 30,2023 | 2,496,494 |  |  | $ | 7.85 |  |  | 6.3 |  | $ | — |
Schedule of Restricted Stock Unit Activity | A summary of r estricted stock unit activity under our equity incentive plans is as follows:
| Number of Awards |  | Weighted- Average Grant Date Fair Value per Share
Unvested and outstanding balance at December 31, 2022 | 2,058,534 |  |  | $ | 12.79 |
Granted | — |  |  | — |
Vested | (817,978) |  |  | 13.11 |
Forfeited | (174,275) |  |  | 20.23 |
Unvested and outstanding balance at June 30, 2023 | 1,066,281 |  |  | $ | 11.32 |
Schedule of Allocated Share-based Compensation Expense | Stock-based compensation expense under our equity incentive plans was as follows (in thousands):
| Three Months Ended June 30, |  | Six Months Ended June 30,
| 2023 |  | 2022 |  | 2023 |  | 2022
Cost of sales (1) | $ | (826) |  |  | $ | 764 |  |  | $ | (453) |  |  | $ | 1,643 |
Selling and administrative expenses (2) | 3,977 |  |  | 3,983 |  |  | 8,823 |  |  | 9,643 |
Total | $ | 3,151 |  |  | $ | 4,747 |  |  | $ | 8,370 |  |  | $ | 11,286 |
(1) Cost of sales for the three and six months ended June 30, 2023 includes a net reversal of $1.1 million of stock-based compensation expense associated with equity awards granted to an independent contractor for services pursuant to the terms of a license services and collaboration agreement. Stock-based compensation expense associated with equity awards granted to an independent contractor for services pursuant to the terms of a license, services and collaboration agreement and recorded in cost of sales for the three and six months ended June 30, 2022 were $0.6 million and $0.7 million, respectively. (2) Selling and administrative expenses for the three and six months ended June 30, 2023 includes $1.3 million and $2.3 million of accelerated amortization of stock-based compensation expense for certain equity awards during the three and six months ended June 30, 2023, respectively.

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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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