Commitments And Contingencies (Schedule Of Net Book Value Of Finance Lease) (Details) - USD ($)	Mar. 31, 2021	Dec. 31, 2020
Assets
Leased equipment under finance lease,	$ 100,097	$ 100,097
less accumulated amortization	91,045	84,837
Net	9,052	15,260
Liabilities
Obligations under finance lease (current)
Obligations under finance lease (noncurrent)
Total

Amount equal to the present value (the principal) at the beginning of the lease term of minimum lease payments during the lease term (excluding that portion of the payments representing executory costs such as insurance, maintenance, and taxes to be paid by the lessor, together with any profit thereon) net of payments or other amounts applied to the principal through the balance sheet date.

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Amount before accumulated depreciation of leased physical assets used in the normal conduct of business to produce goods and services.

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The total gross amount less the charge for the use of the long-lived depreciable assets subject to a lease meeting the criteria for capitalization.

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The total charge for the use of long-lived depreciable assets subject to a lease meeting the criteria for capitalization.

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Present value of lessee's discounted obligation for lease payments from finance lease, classified as noncurrent.

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Amount of long-term debt and lease obligation, classified as current.

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