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Stockholders' Equity - Outstanding Warrants (Details) - Common stock warrants	3 Months Ended
	Mar. 31, 2022 $ / shares shares
Common Stock Warrants
Warrants Outstanding (in shares) | shares	1,530,176
Weighted Average
Common Stock Warrants
Exercise Price (in dollars per share) | $ / shares	$ 41.75
Weighted average life (in years)	4 years 4 months 2 days
Warrants Issued in 2018
Common Stock Warrants
Warrants Outstanding (in shares) | shares	699,962
Exercise Price (in dollars per share) | $ / shares	$ 72.00
Warrants Issued in 2019
Common Stock Warrants
Warrants Outstanding (in shares) | shares	331,858
Exercise Price (in dollars per share) | $ / shares	$ 37.50
Warrants Issued In 2021
Common Stock Warrants
Warrants Outstanding (in shares) | shares	498,356
Exercise Price (in dollars per share) | $ / shares	$ 2.10

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- 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

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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=123467817&loc=d3e21475-112644

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- Definition

Number of warrants or rights outstanding.

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