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Restructuring, Impairment and Other Costs of Terminated Program (Tables) | 12 Months Ended
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Dec. 31, 2022
Restructuring and Related Activities [Abstract] |
Schedule of Restructuring, Impairment and Other Costs of Terminated Program | Restructuring, impairment and other costs of terminated program includes the following (in thousands):
|  | Year Ended December 31, 2022
Clinical trial expense, other third-party and employee costs for the wind down of the bempegaldesleukin program |  | $ | 31,693 |
Severance and benefit expense |  | 30,904 |
Impairment of right-of-use assets and property, plant and equipment |  | 65,761 |
(Gain) loss on sale or disposal of property, plant and equipment, net |  | (3,326) |
Contract termination and other restructuring costs |  | 10,898 |
Restructuring, impairment and other costs of terminated program |  | $ | 135,930 |
The following table provides details regarding the severance and other termination benefit expense. We present the liability, which we paid in January 2023, in accrued compensation on our Consolidated Balance Sheet (in thousands):
|  | Year Ended December 31, 2022
|  | No service period |  | Service period required |  | Total
Liability balance as of March 31, 2022 |  | $ | — |  |  | $ | — |  |  | $ | — |
Expense recognized during the period |  | 22,993 |  |  | 7,911 |  |  | 30,904 |
Payments during the period |  | (22,993) |  |  | (4,612) |  |  | (27,605) |
Liability balance as of December 31, 2022 |  | $ | — |  |  | $ | 3,299 |  |  | $ | 3,299 |
We recorded impairment charges as follows (in thousands):
| Year Ended December 31, 2022
| Operating Lease Right-of-Use Assets |  | Property, Plant and Equipment |  | Total
Net book value of impaired sublease assets as of May 31, 2022 | $ | 72,481 |  |  | $ | 16,348 |  |  | $ | 88,829 |
Less: Fair value of impaired sublease assets — Level 3 of Fair Value Hierarchy | (16,174) |  |  | (4,780) |  |  | (20,954) |
Book value in excess of fair value | 56,307 |  |  | 11,568 |  |  | 67,875 |
Less: Amounts recorded as amortization between May 31 and December 31, 2022 for Third St. facility | (1,717) |  |  | (397) |  |  | (2,114) |
Total impairment of sublease assets | $ | 54,590 |  |  | $ | 11,171 |  |  | $ | 65,761 |
Schedule of Property, Plant and Equipment | Property, plant and equipment consists of the following (in thousands):
| December 31,
| 2022 |  | 2021
Building and leasehold improvements | $ | 74,889 |  |  | $ | 97,385 |
Laboratory equipment | 24,243 |  |  | 42,704 |
Computer equipment and software | 26,205 |  |  | 28,829 |
Manufacturing equipment | 25,052 |  |  | 22,374 |
Furniture, fixtures, and other | 4,263 |  |  | 10,094 |
Depreciable property, plant and equipment at cost | 154,652 |  |  | 201,386 |
Less: accumulated depreciation | (124,731) |  |  | (148,039) |
Depreciable property, plant and equipment, net | 29,921 |  |  | 53,347 |
Construction-in-progress | 2,530 |  |  | 7,163 |
Property, plant and equipment, net | $ | 32,451 |  |  | $ | 60,510 |
We recorded the gains and losses as follows (in thousands):
| Year Ended December 31, 2022
Proceeds from sales |  | $ | 13,196 |
Net book value of assets |  | 9,870 |
Total (gain) loss on sale or disposal of property, plan and equipment, net |  | (3,326) |

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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 https://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 https://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 https://asc.fasb.org/extlink&oid=115931487&loc=d3e140904-122747 + Details
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