Stockholders' Equity - Changes in Outstanding Warrants (Details) - Common stock warrants - $ / shares	3 Months Ended
Mar. 31, 2021	Mar. 31, 2022
Stockholders' Equity
Warrants to purchase common stock	747,383	747,383
Weighted-average exercise price	$ 11.06	$ 11.06
Outstanding, beginning balance	758,939
Issued	31,000
Expired	(42,556)
Outstanding, ending balance	747,383

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

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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Number of securities into which the class of warrant or right may be converted. For example, but not limited to, 500,000 warrants may be converted into 1,000,000 shares.

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Number of equity instruments other than options outstanding, including both vested and non-vested instruments.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
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