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Fixed Assets | 12 Months Ended
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Dec. 31, 2019
Property, Plant and Equipment [Abstract] |
Fixed Assets | Fixed Assets Fixed assets at December 31, 2019 and 2018 consist of the following:
| Cost |  | Accumulated Depreciation and Amortization |  | Net Book Value
As of December 31, 2019 |  |  |  |  |
Leasehold improvements | $ | 15,007,935 |  |  | $ | (4,996,777 | ) |  | $ | 10,011,158 |
Laboratory equipment | 4,102,467 |  |  | (3,229,357 | ) |  | 873,110 |
Office furniture and fixtures | 3,048,053 |  |  | (1,944,293 | ) |  | 1,103,760 |
Computer equipment and other | 3,781,020 |  |  | (2,996,031 | ) |  | 784,989 |
| $ | 25,939,475 |  |  | $ | (13,166,458 | ) |  | $ | 12,773,017 |
As of December 31, 2018 |  |  |  |  |
Leasehold improvements | $ | 14,909,341 |  |  | $ | (3,464,444 | ) |  | $ | 11,444,897 |
Laboratory equipment | 4,031,965 |  |  | (2,425,854 | ) |  | 1,606,111 |
Office furniture and fixtures | 3,198,803 |  |  | (1,767,653 | ) |  | 1,431,150 |
Computer equipment and other | 3,808,824 |  |  | (2,341,968 | ) |  | 1,466,856 |
| $ | 25,948,933 |  |  | $ | (9,999,919 | ) |  | $ | 15,949,014 |
Depreciation expense for the years ended December 31, 2019, 2018 and 2017 was $3.6 million, $3.7 million and $1.9 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, 2019 the Company disposed of fixed assets with a net book value of $6,000 and accumulated depreciation of $432,000.

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- References No definition available. + Details
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- Definition The entire disclosure for long-lived, physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, accounting policies and methodology, roll forwards, depreciation, depletion and amortization expense, including composite depreciation, accumulated depreciation, depletion and amortization expense, useful lives and method used, income statement disclosures, assets held for sale and public utility disclosures. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -URI http://asc.fasb.org/topic&trid=2155823 + Details
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