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Common Stock and Warrants - Warrants Outstanding and Exercisable (Details)	12 Months Ended
	Dec. 31, 2020 $ / shares shares	Dec. 31, 2020 $ / shares shares
Class Of Warrant Or Right [Line Items]
Number of Warrants Outstanding	341,905	341,905
Warrants Expiration Date, April 21, 2021
Class Of Warrant Or Right [Line Items]
Number of Warrants Outstanding	68,351	68,351
Exercise price | $ / shares		$ 428.75
Expiration Date	Apr. 21, 2021
Warrants Expiration Date, March 20, 2025
Class Of Warrant Or Right [Line Items]
Number of Warrants Outstanding	178,776	178,776
Exercise price | $ / shares	$ 16.10
Expiration Date	Mar. 20, 2025
Warrants Expiration Date, October 26, 2023
Class Of Warrant Or Right [Line Items]
Number of Warrants Outstanding	17,431	17,431
Exercise price | $ / shares		$ 16.1665
Expiration Date	Oct. 26, 2023
Warrants Expiration Date, October 26, 2023
Class Of Warrant Or Right [Line Items]
Number of Warrants Outstanding	76,386	76,386
Exercise price | $ / shares	$ 15.82
Expiration Date	Oct. 26, 2023
Warrants Expiration Date, October 26, 2023
Class Of Warrant Or Right [Line Items]
Number of Warrants Outstanding	961	961
Exercise price | $ / shares	$ 19.775
Expiration Date	Oct. 26, 2023

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+ References

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- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21475-112644

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