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Restructuring (Tables) | 12 Months Ended
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Dec. 31, 2020
Restructuring And Related Activities [Abstract] |
Schedule of Major Components of Restructuring Costs | The major components of our restructuring costs are summarized as follows (in thousands):
Components of Restructuring Costs |  | Restructuring Costs Incurred for the Year Ended December 31, 2019 |
Severance and other termination benefits |  | $ | 6,277 |
Stock-based compensation expense (a) |  |  | 4,122 |
Accelerated depreciation |  |  | 2,957 |
Total restructuring cost |  | $ | 13,356 |
| (a) | As a result of accelerated vesting of stock awards and the extension of exercise period of stock options
Schedule of Components of the Restructuring Liabilities | The outstanding restructuring liabilities are included in accrued liabilities on the consolidated balance sheets. As of December 31, 2020 and 2019, the components of the restructuring liabilities were as follows (in thousands):
| Severance and Other Termination Benefits |
Balance at December 31, 2018 | $ | - |
Severance and other termination benefits |  | 6,277 |
Cash payments or settlements |  | (5,602 | )
Balance at December 31, 2019 | $ | 675 |
Cash payments or settlements |  | (675 | )
Balance at December 31, 2020 | $ | - |

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- Definition Tabular disclosure of costs incurred for restructuring including, but not limited to, exit and disposal activities, remediation, implementation, integration, asset impairment, and charges against earnings from the write-down of assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 5.P.3) -URI http://asc.fasb.org/extlink&oid=115931487&loc=d3e140864-122747 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB TOPIC 5.P.4) -URI http://asc.fasb.org/extlink&oid=115931487&loc=d3e140904-122747 + Details
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- Definition Tabular disclosure of an entity's restructuring reserve that occurred during the period associated with the exit from or disposal of business activities or restructurings for each major type of cost. This element may also include a description of any reversal and other adjustment made during the period to the amount of an accrued liability for restructuring activities. This element may be used to encapsulate the roll forward presentations of an entity's restructuring reserve by type of cost and in total, and explanation of changes that occurred in the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b)(2) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 5.P.4(b)(2)) -URI http://asc.fasb.org/extlink&oid=115931487&loc=d3e140904-122747 + Details
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