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Property and Equipment | 12 Months Ended
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Dec. 31, 2022
Property Plant And Equipment [Abstract] |
Property and Equipment | 7. Property and Equipment Property and equipment consist of the following (in thousands):
|  | Estimated Useful |  |  | December 31, |  |
|  | Life (Years) |  |  | 2022 |  |  | 2021 |  |
Land |  |  | — |  |  | $ | 875 |  |  | $ | 875 |  |
Buildings |  | 39-40 |  |  |  | 17,389 |  |  |  | 17,389 |  |
Building improvements |  | 5-40 |  |  |  | 38,952 |  |  |  | 38,651 |  |
Machinery and equipment |  | 3-15 |  |  |  | 58,542 |  |  |  | 55,334 |  |
Furniture, fixtures and office equipment |  | 5-10 |  |  |  | 2,976 |  |  |  | 2,969 |  |
Computer equipment and software |  |  | 3 |  |  |  | 8,246 |  |  |  | 8,163 |  |
Construction in progress |  |  | — |  |  |  | 16,706 |  |  |  | 10,892 |  | (1)
|  |  |  |  |  |  | 143,686 |  |  |  | 134,273 |  |
Less accumulated depreciation |  |  |  |  |  |  | (98,560 | ) |  |  | (97,661 | ) |
Total property and equipment, net |  |  |  |  |  | $ | 45,126 |  |  | $ | 36,612 |  |
_________________________
(1) | As of December 31, 2021 construction in progress included $4.7 million of equipment under construction for the manufacturing expansion for UT (the “UT Equipment”). There is no balance under construction for the UT Equipment as of December 31, 2022. The Company acts as agent on behalf of UT for the procurement of the UT Equipment. The Company has received $5.0 million in deposit for this service, which was recognized as deposits from customer in the consolidated balance sheet as of December 31, 2021. In April 2022, the Company and UT agreed that UT would hold title to the UT Equipment at all times. As such, there is no balance related to the UT Equipment included in construction in progress or deposits from customer in our consolidated balance sheet as of December 31, 2022. See Note 11 – Collaboration, Licensing and Other Arrangements.
Depreciation expense related to property and equipment for the years ended December 31, 2022, 2021 and 2020 was $3.3 million, $2.0 million and $1.8 million, respectively. During the years ended December 31, 2022 and 2021, the Company retired $2.4 million and $1.1 million, respectively of manufacturing equipment, computer hardware and software, computer equipment, lab equipment, and building improvements, as it was no longer in service. The net book value for the disposed assets was de minimis. On November 8, 2021, the Company sold certain land, building and improvements located in Danbury, CT (the “Property”) to an affiliate of Creative Manufacturing Properties (the “Purchaser”) for a sales price of $102.3 million, subject to the terms and the conditions contained in a purchase and sale agreement. Effective with the closing of this transaction, the Company entered into a 20-year lease agreement with the Purchaser (the “Sale-Leaseback Transaction”). The sale of the Property and subsequent lease did not result in the transfer of control of the Property to the Purchaser; therefore, the Sale-Leaseback Transaction qualified as a failed sale leaseback transaction whereby the lease is accounted for as finance lease and the Property remains as a long-lived asset of the Company and is depreciated at its remaining useful life of 20 years or less. See Note 16 – Commitments and Contingencies.

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- Definition The entire disclosure for long-lived, physical asset used in normal conduct of business and not intended for resale. Includes, but is not limited to, work of art, historical treasure, and similar asset classified as collections. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 958 -SubTopic 360 -Section 50 -Paragraph 6 -URI https://asc.fasb.org/extlink&oid=126982197&loc=d3e99893-112916 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -URI https://asc.fasb.org/topic&trid=2155823 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 958 -SubTopic 360 -Section 50 -Paragraph 7 -URI https://asc.fasb.org/extlink&oid=126982197&loc=SL120174063-112916 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 958 -SubTopic 360 -Section 50 -Paragraph 1 -Subparagraph (d) -URI https://asc.fasb.org/extlink&oid=126982197&loc=d3e99779-112916 + Details
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