C. BALANCE SHEET COMPONENTS (Details) - USD ($)	Dec. 31, 2018	Dec. 31, 2017
C. Balance Sheet Components
Laboratory equipment	$ 354,861	$ 354,861
Computer equipment and software	96,593	88,998
Office furniture and fixtures	130,192	130,192
Property, plant and equipment, gross	581,646	574,051
Less: accumulated depreciation	(573,121)	(564,106)
Property, plant and equipment, net	$ 8,525	$ 9,945

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Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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Amount before accumulated depreciation of equipment commonly used in offices and stores that have no permanent connection to the structure of a building or utilities. Examples include, but are not limited to, desks, chairs, tables, and bookcases.

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Amount before accumulated depreciation of tangible personal property used to produce goods and services, including, but is not limited to, tools, dies and molds, computer and office equipment.

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Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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