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Warrants - Summary of Warrant Activity (Details) - Warrant [Member] - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Number of Warrants Issued, Warrants outstanding, Beginning Balance	3,058,402	1,487,958
Number of Warrants Issued, Warrants issued	190,114	9,231,628
Number of Warrants Issued, Warrants exercised		(7,617,147)
Number of Warrants Issued, Warrants cancelled in exchange for common stock	(1,641,427)
Number of Warrants Issued, Warrants expired	(13,927)	(44,037)
Number of Warrants Issued, Warrants outstanding and exercisable, Ending Balance	1,593,162	3,058,402
Weighted Average Exercise Price, Warrants outstanding, Beginning Balance	$ 5.29	$ 9.39
Weighted Average Exercise Price, Warrants issued	2.63	3.46
Weighted Average Exercise Price, Warrants exercised		2.89
Weighted Average Exercise Price, Warrants cancelled in exchange for common stock	3.04
Weighted Average Exercise Price, Warrants expired	226.24	209.23
Weighted Average Exercise Price, Warrants outstanding and exercisable, Ending Balance	$ 5.36	$ 5.29
Aggregate intrinsic value of outstanding warrants
Weighted average remaining contractual terms (years)	1 year 10 months 14 days

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- Definition

Number of Warrants Issued, Warrants expired.

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Number of Warrants Issued, Warrants exercised.

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Weighted Average Exercise Price, Warrants exercised.

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Weighted Average Exercise Price, Warrants expired.

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Weighted Average Exercise Price, Warrants issued

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- Definition

Number of Warrants Issued, Warrants issued.

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- Definition

The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

+ 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)(iv)(3)
-URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901

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- Definition

Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
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-Paragraph 2
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-URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901

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- Definition

The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
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-Paragraph 2
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The weighted average fair value of nonvested awards on equity-based plans excluding option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, revenue or profit achievement stock award plan) for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares or units.

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- Definition

Weighted average remaining contractual term for equity-based awards excluding options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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- Definition

Intrinsic value of equity-based compensation awards outstanding. Excludes stock and unit options.

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