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Income Taxes - Avedro Net Operating Loss Carryforwards and Tax Credits (Details) - USD ($) $ in Thousands | Nov. 21, 2019 | Dec. 31, 2019
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Income Taxes |  |
Deferred tax liabilities |  | $ 104,537
Federal |  |
Income Taxes |  |
Net operating loss carryforwards |  | 355,600
Federal | Research and development credit carryforward |  |
Income Taxes |  |
Tax credit carryforwards |  | 28,900
State |  |
Income Taxes |  |
Net operating loss carryforwards |  | 144,000
State | Research and development credit carryforward |  |
Income Taxes |  |
Tax credit carryforwards |  | 12,800
Tax credit subject to expiration |  | $ 2,900
Avedro |  |
Income Taxes |  |
Total Merger Consideration | $ 437,751 |
Deferred tax liabilities | 75,900 |
Avedro | Federal |  |
Income Taxes |  |
Net operating loss carryforwards | 178,800 |
Net operating loss carryforward expiring | 80,200 |
Avedro | Federal | Research and development credit carryforward |  |
Income Taxes |  |
Tax credit carryforwards | 17,300 |
Tax credit subject to expiration | 14,700 |
Avedro | State |  |
Income Taxes |  |
Net operating loss carryforwards | 97,200 |
Net operating loss carryforward expiring | 36,400 |
Avedro | State | Research and development credit carryforward |  |
Income Taxes |  |
Tax credit carryforwards | 3,000 |
Tax credit subject to expiration | $ 1,500 |

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