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Stockholders' Equity - Outstanding Warrants from the January 2020 Equity Offering (Details) - $ / shares	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Jun. 30, 2021	Jan. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Warrants issued (in shares)	229,414	310,860
January 2020 Equity Offering
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Warrants issued (in shares)	229,414	310,860
Exercise price of common stock (USD per share)	$ 3.67	$ 3.59
Investor Warrants
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Warrants issued (in shares)	187,734	269,180
Sale of common stock (USD per share)			$ 5.05
Exercise price of common stock (USD per share)				$ 3.37
January 2020 Institutional Investor
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Sale of common stock (USD per share)				3.3700
January 2020 Equity Offering, Private Placement
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Warrants issued (in shares)	41,680	41,680
Exercise price of common stock (USD per share)				$ 4.9940

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Class Of Warrant Or Right, Warrants Issued

+ 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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