Summary of Significant Accounting Policies - Potentially dilutive securities (Details) - shares	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Potentially dilutive securities
Potentially dilutive securities excluded from computation of diluted weighted average shares	2,268,769	1,908,891
Stock Options
Potentially dilutive securities
Potentially dilutive securities excluded from computation of diluted weighted average shares	1,886,083	1,634,458
Restricted stock units
Potentially dilutive securities
Potentially dilutive securities excluded from computation of diluted weighted average shares	294,130	185,877
Common Stock Warrants
Potentially dilutive securities
Potentially dilutive securities excluded from computation of diluted weighted average shares	88,556	88,556