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Basis of Presentation and Summary of Significant Accounting Policies - Anti-dilutive Share Equivalents (Details) - shares	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Net Loss Per Share
Antidilutive securities excluded from computation of earnings per share (in shares)	9,807,474	11,617,078
Options to purchase Common Stock
Net Loss Per Share
Antidilutive securities excluded from computation of earnings per share (in shares)	1,860,507	1,015,418
Warrants to purchase Common Stock
Net Loss Per Share
Antidilutive securities excluded from computation of earnings per share (in shares)	5,260,992	10,589,482
Restricted Stock Units
Net Loss Per Share
Antidilutive securities excluded from computation of earnings per share (in shares)	491	11,301
Series A Convertible Preferred Stock
Net Loss Per Share
Antidilutive securities excluded from computation of earnings per share (in shares)	877	877
Series E Convertible Preferred Stock
Net Loss Per Share
Antidilutive securities excluded from computation of earnings per share (in shares)	2,684,607	0

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Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

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+ References

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