Summary of Significant Accounting Policies - Basic and Diluted Loss Per Common Share (Details) - shares	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Stock options
Anti-dilutive securities
Outstanding securities not included in the computation of diluted net loss per common share as their inclusion would be anti-dilutive (in shares)	1,820,142	1,454,844
Unvested restricted common stock
Anti-dilutive securities
Outstanding securities not included in the computation of diluted net loss per common share as their inclusion would be anti-dilutive (in shares)		52,063
Preferred Stock
Anti-dilutive securities
Outstanding securities not included in the computation of diluted net loss per common share as their inclusion would be anti-dilutive (in shares)	1,969,797	1,969,797