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Basis of Presentation and Summary of Significant Accounting Policies - Anti-dilutive Share Equivalents (Details) - shares	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Net Loss Per Share
Antidilutive securities excluded from computation of earnings per share (in shares)	10,947,627	9,807,474
Options to purchase Common Stock
Net Loss Per Share
Antidilutive securities excluded from computation of earnings per share (in shares)	3,771,984	1,860,507
Warrants to purchase Common Stock
Net Loss Per Share
Antidilutive securities excluded from computation of earnings per share (in shares)	4,490,159	5,260,992
Restricted Stock Units
Net Loss Per Share
Antidilutive securities excluded from computation of earnings per share (in shares)	0	491
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	2,684,607

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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=124432515&loc=d3e3550-109257

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+ References

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