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Stockholders' Equity - Common Stock Warrants (Details) - Common stock warrants	3 Months Ended
	Mar. 31, 2020 $ / shares shares
Common Stock Warrants
Weighted average life (in years)	3 years 5 months 5 days
Weighted Average
Common Stock Warrants
Exercise Price (in dollars per share)	$ 10.19
Warrants Issued in 2014
Common Stock Warrants
Warrants Outstanding (in shares) | shares	1,227
Exercise Price (in dollars per share)	$ 122.12
Warrants Issued in 2015
Common Stock Warrants
Warrants Outstanding (in shares) | shares	1,227
Exercise Price (in dollars per share)	$ 122.12
Warrants Issued in 2018
Common Stock Warrants
Warrants Outstanding (in shares) | shares	4,199,995
Exercise Price (in dollars per share)	$ 12.00
Warrants Issued in 2019
Common Stock Warrants
Warrants Outstanding (in shares) | shares	1,991,300
Exercise Price (in dollars per share)	$ 6.25

X

- Definition

Weighted average remaining contractual life of warrant, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

No definition available.

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- Definition

Exercise price per share or per unit of warrants or rights outstanding.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(i)(4))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

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- Definition

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+ References

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- Definition

Number of warrants or rights outstanding.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(i))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

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