Net Loss Per Common Share - Common Share Equivalents Excluded from the Calculations of Diluted Loss Per Common Share (Details) - shares	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Common share equivalents excluded from the calculations of diluted loss per common share	4,976,467	4,251,366
Stock Options
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Common share equivalents excluded from the calculations of diluted loss per common share	4,528,607	3,398,099
Restricted Stock
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Common share equivalents excluded from the calculations of diluted loss per common share	314,811	671,895
Restricted Stock Units
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Common share equivalents excluded from the calculations of diluted loss per common share	133,049	181,372