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Note 4 - Property and Equipment | 12 Months Ended
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Dec. 31, 2020
Notes to Financial Statements |
Property, Plant and Equipment Disclosure [Text Block] | 4. Property and Equipment Property and equipment consists of the following:
|  | December 31, |
|  | 2020 |  |  | 2019 |
Laboratory equipment |  | $ | 182,357 |  |  | $ | 182,357 |
Furniture and office equipment |  |  | 151,442 |  |  |  | 151,442 |
Leasehold improvements |  |  | 430,000 |  |  |  | 430,000 |
Total property and equipment |  |  | 763,799 |  |  |  | 763,799 |
Less: accumulated depreciation and amortization |  |  | (614,601 | ) |  |  | (511,433 | )
Property and equipment, net |  | $ | 149,198 |  |  | $ | 252,366 |
Depreciation and amortization expense was approximately $0.1 million for both the years ended December 31, 2020 and 2019.

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