Income Taxes (Narrative) (Details) - USD ($)	12 Months Ended
Dec. 31, 2017	Dec. 31, 2016
Income Taxes [Abstract]
New Federal corporate tax rate for periods beginning on or after January 1, 2018	21.00%
Valuation allowance	$ 12,547,096	$ 16,869,912
Change in valuation allowance	4,322,819	446,892
Domestic [Member]
Income Taxes [Abstract]
U.S. net operating loss carryforwards	$ 48,166,052	$ 43,669,900
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://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32537-109319

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- Definition

Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-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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- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 45
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=84176650&loc=d3e32123-109318

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