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Equity Incentive Awards | 6 Months Ended
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Jun. 30, 2022
Share-Based Payment Arrangement [Abstract] |
Equity Incentive Awards | Equity Incentive Awards Stock Options The following table summarizes the Company’s option activity and related information:
| Number of Options (in thousands) |  | Weighted- Average Exercise Price
Balance at December 31, 2021 | 13,288 |  |  | $ | 9.34 |
Options granted | 6,994 |  |  | 1.33 |
Options exercised | (15) |  |  | 0.19 |
Options forfeited | (3,469) |  |  | 5.96 |
Balance at June 30, 2022 | 16,798 |  |  | $ | 6.71 |
Exercisable as of June 30, 2022 | 4,739 |  |  | $ | 12.02 |
Options granted during the six months ended June 30, 2022 include 0.9 million shares of performance-based non-qualified options with both performance and service vesting conditions. Restricted Stock Units (“RSUs”) The following table summarizes the Company’s RSUs activity and related information:
| Number of Units (in thousands) |  | Weighted- Average Grant- Date Fair Value
Outstanding at December 31, 2021 | 2,126 |  |  | $ | 3.76 |
Granted | 857 |  |  | 1.43 |
Vested and released | (376) |  |  | 4.64 |
Forfeited | (220) |  |  | 2.51 |
Outstanding at June 30, 2022 | 2,387 |  |  | $ | 2.90 |
RSUs granted during the six months ended June 30, 2022 include 0.4 million shares of performance units with both performance and service vesting conditions. Stock-Based Compensation Expense The following table presents, by operating expense, the Company’s stock-based compensation expense:
| Three Months Ended June 30, |  | Six Months Ended June 30,
| 2022 |  | 2021 |  | 2022 |  | 2021
| (In thousands)
Research and development | $ | 1,830 |  |  | $ | 2,579 |  |  | $ | 3,763 |  |  | $ | 4,918 |
General and administrative | 3,112 |  |  | 5,655 |  |  | 6,560 |  |  | 10,540 |
Total stock-based compensation expense | $ | 4,942 |  |  | $ | 8,234 |  |  | $ | 10,323 |  |  | $ | 15,458 |

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- Definition The entire disclosure for shareholders' equity and share-based payment arrangement. Includes, but is not limited to, disclosure of policy and terms of share-based payment arrangement, deferred compensation arrangement, and employee stock purchase plan (ESPP). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -URI https://asc.fasb.org/topic&trid=2208762 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -URI https://asc.fasb.org/topic&trid=2228938 + Details
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