Income Taxes (Narrative) (Details) - USD ($)	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018
Income Taxes [Abstract]
New Federal corporate tax rate for periods beginning on or after January 1, 2018	21.00%
Valuation allowance	$ 12,533,538	$ 12,601,550
Change in valuation allowance	(68,012)	54,454
Domestic [Member]
Income Taxes [Abstract]
U.S. net operating loss carryforwards	$ 48,152,000	$ 48,495,000
Minimum [Member] \| Domestic [Member]
Income Taxes [Abstract]
U.S. net operating loss carryforwards expiration dates	Dec. 31, 2017

New Federal corporate tax rate for periods beginning on or after January 1, 2018.

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Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)
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Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32559-109319

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Expiration date of each operating loss carryforward included in operating loss carryforward, in CCYY-MM-DD format.

+ References

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Amount of increase (decrease) in the valuation allowance for a specified deferred tax asset.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 45
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=116821951&loc=d3e32123-109318

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