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Fixed Assets | 12 Months Ended
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Dec. 31, 2022
Property, Plant and Equipment [Abstract] |
Fixed Assets | Fixed Assets Fixed assets at December 31, 2022 and 2021 consisted of the following:
| Cost |  | Accumulated Depreciation and Amortization |  | Net Book Value
As of December 31, 2022 |  |  |  |  |
Leasehold improvements | $ | 15,803,108 |  |  | $ | (10,036,080) |  |  | $ | 5,767,028 |
Research and development equipment | 5,300,104 |  |  | (4,295,217) |  |  | 1,004,887 |
Office furniture and fixtures | 2,827,476 |  |  | (2,803,800) |  |  | 23,676 |
Computer equipment and other | 5,360,712 |  |  | (4,428,306) |  |  | 932,406 |
| $ | 29,291,400 |  |  | $ | (21,563,403) |  |  | $ | 7,727,997 |
As of December 31, 2021 |  |  |  |  |
Leasehold improvements | $ | 15,803,108 |  |  | $ | (8,258,608) |  |  | $ | 7,544,500 |
Research and development equipment | 12,392,916 |  |  | (4,279,816) |  |  | 8,113,100 |
Office furniture and fixtures | 2,827,476 |  |  | (2,599,643) |  |  | 227,833 |
Computer equipment and other | 5,374,084 |  |  | (3,806,311) |  |  | 1,567,773 |
| $ | 36,397,584 |  |  | $ | (18,944,378) |  |  | $ | 17,453,206 |
Depreciation expense for the years ended December 31, 2022, 2021 and 2020 was $3.7 million, $3.0 million and $3.0 million, respectively. The Company determined that the carrying value of these long-lived assets was not impaired during the periods presented. During the year ended December 31, 2022 the Company sold fixed assets with a net book value of $6.1 million and disposed of fixed assets with a net book value of $1.1 million. The Company has recorded a receivable from the sale of these assets of $6.1 million, which is included in prepaid expenses and other current assets on the consolidated balance sheet.

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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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