Stock Option Plans and Warrants to Purchase Common Stock (Details 5)	12 Months Ended
Dec. 31, 2019 $ / shares shares
Warrant [Member]
Exercise Price \| $ / shares	$ 2.88
Remaining Contractual Life in Years	2 years 7 days
Outstanding Warrants	6,192,711
Exercisable Warrants	6,192,711
12/16/2016 [Member]
Exercise Price \| $ / shares	$ 3.95
Remaining Contractual Life in Years	1 year 11 months 15 days
Outstanding Warrants	2,403,405
Exercisable Warrants	2,403,405
11/3/2017 [Member]
Exercise Price \| $ / shares	$ 2.50
Remaining Contractual Life in Years	2 years 9 months 29 days
Outstanding Warrants	51,151
Exercisable Warrants	51,151
4/1/2018 [Member]
Exercise Price \| $ / shares	$ 1.95
Remaining Contractual Life in Years	3 years 2 months 27 days
Outstanding Warrants	10,000
Exercisable Warrants	10,000
7/2/2018 [Member]
Exercise Price \| $ / shares	$ 2.25
Remaining Contractual Life in Years	2 years 4 days
Outstanding Warrants	3,572,815
Exercisable Warrants	3,572,815
7/9/2018 [Member]
Exercise Price \| $ / shares	$ 1.13
Remaining Contractual Life in Years	2 years 11 months 26 days
Outstanding Warrants	155,340
Exercisable Warrants	155,340

The number of shares reserved for issuance pertaining to the outstanding exercisable stock options as of the balance sheet date in the customized range of exercise prices for which the market and performance vesting condition has been satisfied.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(iii)
-URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901

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- Definition

The number of shares reserved for issuance pertaining to the outstanding stock options as of the balance sheet date for all option plans in the customized range of exercise prices.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(i)-(ii)
-URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901

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- Definition

The ceiling of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (g)
-URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901

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- Definition

Weighted average remaining contractual term of outstanding stock options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
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-URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901

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