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Note 3 - Property and Equipment | 12 Months Ended
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Dec. 31, 2019
Notes to Financial Statements |
Property, Plant and Equipment Disclosure [Text Block] | 3. Property and Equipment Property and equipment as shown on the accompanying Consolidated Balance Sheets is composed of the following as of December 31, 2019 and 2018:
|  | 2019 |  |  | 2018 |
Laboratory equipment |  | $ | 534,577 |  |  | $ | 530,306 |
Leasehold improvements |  |  | 115,605 |  |  |  | 115,605 |
Other furniture, fixtures & equipment |  |  | 11,736 |  |  |  | 28,685 |
Total property and equipment |  |  | 661,918 |  |  |  | 674,596 |
Accumulated depreciation and amortization |  |  | (651,312 | ) |  |  | (663,246 | )
Property and equipment, net |  | $ | 10,606 |  |  | $ | 11,350 |
Depreciation expense was $8,350 and $19,801 during the years ended December 31, 2019 and 2018, respectively.

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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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