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Stock-Based Compensation (Tables) | 3 Months Ended
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Mar. 31, 2021
Share-based Payment Arrangement [Abstract] |
Stock-Based Compensation Expense | We recognized total stock-based compensation expense in our Condensed Consolidated Statements of Operations as follows (in thousands):
| Three months ended March 31,
| 2021 |  | 2020
Cost of goods sold | $ | 727 |  |  | $ | 761 |
Research and development | 14,162 |  |  | 15,453 |
General and administrative | 9,009 |  |  | 7,997 |
Impairment of assets and other costs for terminated program | — |  |  | 1,025 |
Total stock-based compensation | $ | 23,898 |  |  | $ | 25,236 |
Share-based Compensation, Activity | We issued stock-based awards and resulting shares of our common stock as follows (shares in thousands):
| Three months ended March 31,
| 2021 |  | 2020
Options granted | 121 |  |  | 49 |
Weighted-average grant-date fair value of options granted | $ | 10.82 |  |  | $ | 11.88 |
RSUs granted | 367 |  |  | 245 |
Weighted-average grant-date fair value of RSUs granted | $ | 20.63 |  |  | $ | 18.91 |
Shares issued under equity compensation plans | 2,199 |  |  | 1,358 |

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