Summary of Significant Accounting Policies - Net Loss per Common Share (Details) - shares	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Class of Stock [Line Items]
Potentially dilutive common stock equivalents excluded from calculation of diluted net income per common share	215,794	561,654
Convertible preferred stock
Class of Stock [Line Items]
Potentially dilutive common stock equivalents excluded from calculation of diluted net income per common share	62	478,184
Options
Class of Stock [Line Items]
Potentially dilutive common stock equivalents excluded from calculation of diluted net income per common share	198,484	38,936
Warrants
Class of Stock [Line Items]
Potentially dilutive common stock equivalents excluded from calculation of diluted net income per common share	17,248	44,534